A year ago, based on a leak from Senator Charles Schumer’s office, I attacked Amtrak for paying double for its new high-speed trains – $2.5 billion for 28 trainsets, about $11 million per car. Amtrak at the time denied the press release, saying it was still in the process of selecting a bidder. However, last week Amtrak announced the new order, confirming Schumer’s leak. The trainsets are to cost $2 billion, or $9 million per car, with an additional $500 million spent on other infrastructure. The vendor is Alstom, which is branding all of its export products under the umbrella name Avelia; this train is the Avelia Liberty.
You can see a short promotional video for the trains here and read Alstom’s press release here. Together, they make it obvious why the cost is so high – about twice as high per car as that of Eurostar’s Velaro order, and three times as high as that of the shorter-lived N700 Shinkansen. The Avelia Liberty is a bespoke train, combining features that have not been seen before. Technical specs can also be seen in Alstom’s press kit. The Avelia Liberty will,
- Have a top speed of 300 km/h.
- Have articulated bogies.
- Be capable of 7 degrees of tilt, using the same system as in Alstom’s Pendolino trainset.
In particular, the combination of high speed and high degree of tilt, while technically feasible, does not exist in any production train today. It existed in prototype form, as a tilting TGV, but never made it to mass production. The Pendolino has a top speed of 250 km/h, and the ICE-T has a top speed of 240 km/h. Faster tilting trains do not tilt as much: Talgo claims the Talgo 350 is capable of lateral acceleration of 1.2 m/s^2 in the plane of the train, which corresponds to 180 mm of cant deficiency, achievable with 2-3 degrees of tilt; the tilting Shinkansen have moderate tilting as well, which the JRs call active suspension: the N700 tilts 1 degree, and appears capable of 137 mm of cant deficiency (270 km/h on 2.5 km curves with 200 mm cant), whereas the E5 and E6 tilt 2 degrees, and appear capable of 175 mm (in tests they were supposed to do 360 km/h on 4 km curves with 200 mm cant, but only run at 320 km/h for reasons unrelated to track geometry).
I have argued before, primarily in comments, that a train capable of both high speed and high degree of tilt would be useful on the Northeast Corridor, but not at any price. Moreover, the train is not even planned to run at its advertised top speed, but stay limited to 257 km/h (160 mph), which will only be achievable on short segments in Massachusetts, Rhode Island, and New Jersey. Amtrak has no funded plan to raise the top speed further: the plans for constant-tension catenary in New Jersey are the only funded item increasing top speed. There is no near-term plan on the horizon to obtain such funding – on the contrary, Amtrak’s main priority right now is the Gateway tunnel, providing extra capacity and perhaps avoiding a station throat slowdown, but not raising top speed.
Running trains at 300 km/h on the segments that allow the highest speeds today, or are planned to after the speedup in New Jersey, would save very little time (75 seconds in New Jersey, minus acceleration and deceleration penalties). Making full use of high top speed requires sustaining it over long distances, which means fixing curves in New Jersey that are not on the agenda, installing constant-tension catenary on the entire New York-Washington segment and not just over 40 km of track in New Jersey to eliminate the present-day 215 km/h limit, and building a bypass of the entire segment in southeastern Connecticut along I-95. None of these is on the immediate agenda, and only constant-tension catenary is on the medium-term agenda. Hoping for future funding to materialize is not a valid strategy: the trains would be well past the midpoint of their service lives, and spend many years depreciating before their top speed could be used.
What’s more, if substantial bypasses are built, the value of tilting decreases. In advance of the opening of the Gotthard Base Tunnel, Swiss Federal Railways (SBB) ordered 29 trainsets, without tilting, replacing the tilting Pendolino trains that go through the older tunnel. SBB said tilting would only offer minimal time reduction. The eventual cost of this order: about $36 million per trainset as long as 8 US cars. On the entire Northeast Corridor, the place where tilting does the most to reduce travel time is in Connecticut, and if the eastern half of the tracks in the state are bypassed on I-95, tilting loses value. West of New Haven, tilting is not permitted at all, because of Metro-North’s rules for trains using its tracks; on that segment, tilting will always be valuable, because of the difficulty of finding good rights-of-way for bypasses not involving long tunnels, but to my knowledge Amtrak has not made any move to lift the restriction on tilting. Even with the restriction lifted, a 300+ km/h train with moderate tilting, like the N700 or E5/6 or the Talgo AVRIL, could achieve very fast trip times, with only a few minutes of difference from a hypothetical train with the same top speed and power-to-weight ratio and 7 degrees of tilt. It may still be worth it to develop a train with both high speed and a high degree of tilt, but again, not at any cost, and certainly not as the first trainset to use the line.
Another issue is reliability. The Pendolino tilt system is high-maintenance and unreliable, and this especially affects the heavier Acela. SBB’s rejection of tilting trains was probably in part due to the reliability issues of previous Pendolino service across the Alps, leading to long delays. Poor reliability requires more schedule padding to compensate, and this reduces the advantage gained from faster speed on curves. While tilting trains are overall a net positive on curvy routes like the Connecticut segment of the Northeast Corridor, they are probably not useful in any situation in which 300 km/h top speeds are achievable for a meaningful length of time. This goes double for the Avelia Liberty, which is not a proven Pendolino but a new trainset, sold in a captive market that cannot easily replace it if there are maintenance issues.
In my post a year ago, I complained that Amtrak’s specs were conservative, and did not justify the high cost. I stand behind that assessment: the required trip times are only moderate improvements over the current schedule. At least between New York and Boston, the improvement (9 minutes plus stop penalty at New London) is less than the extent of end-of-line schedule padding, which is at least 10 minutes from Providence to Boston for northbound trains. However, to achieve these small trip time improvements, Amtrak elected to demand exacting specs from the trainsets, leading to high equipment costs.
In 2013, I expounded on this very decision by borrowing a Swiss term: the triangle of rolling stock, infrastructure, and timetable. Planning for all three should be integrated. For example, plans for increases in capacity through infrastructure improvements should be integrated with plans for running more trains, with publicly circulated sample schedules. In this case, the integration involves rolling stock and infrastructure: at low infrastructure investment, as is the case today, there is no need for 300 km/h trainsets, whereas at high investment, high top speed is required but 7-degree tilt is of limited benefit. Instead of planning appropriately based on its expectations of near-term funding, Amtrak chose to waste about a billion dollars paying double for trainsets to replace the Acela.
Amtrak’s plan for high-speed rail on the Northeast Corridor, at a cost of about $290 billion depending on the exact alternative chosen, is unacceptably costly. I went into some details of where excess cost comes from in an older post. In this post, I hope to start a series in which I focus on a specific part of the Northeast Corridor and propose a cheaper alternative than what the NEC Future plan assumes is necessary. The title is taken from a post of mine from four years ago; since then, the projected costs have doubled, hence the title is changed from 90% cheaper to 95% cheaper. In this post, I am going to focus on untangling Frankford Junction.
Frankford Junction is one of the slowest parts of the Northeast Corridor today south of New York. It has a sharp S-curve, imposing a speed limit of 50 mph, or 80 km/h. While worse slowdowns exist, they are all very close to station throats. For example, Zoo Junction just north of Philadelphia 30th Street Station has a curve with radius about 400 meters and an interlocking, so that superelevation is low. The speed limit is low (30 mph, or 50 km/h), but it’s only about 2 km out of the station; it costs about 2 minutes, and with proper superelevation and tilting the speed limit could be doubled, reducing the time cost to 25 seconds. In contrast, Frankford Junction is about 13 km out of 30th Street Station; an 80 km/h restriction there, in the middle of what could be a 200 km/h zone, makes it uneconomic for trains to accelerate to high speed before they clear the junction. This impacts about 4 km, making it a 108-second slowdown, which can be mitigated by either more tilting or a wider curve. In reality, a mixture is required.
The NEC Future plan for high-speed rail, the $290 billion Alternative 3, avoids the Frankford Junction S-curve entirely by tunneling under Center City and building a new HSR station near Market East, a more central location than 30th Street; see PDF-pp. 19, 20, and 78 of Appendix A of the environmental impact statement. This option should be instantly disposed of: 30th Street is close enough to the Philadelphia CBD, and well-connected enough to the region by public transit, that it is no worse a station choice than Shin-Osaka. The Tokaido Shinkansen could not serve Osaka Station as a through-station without tunneling; since Japan National Railways wanted to be able to extend HSR onward, as it eventually did with the Sanyo Shinkansen, it chose to serve Osaka via a new station, Shin-Osaka, 3 km away from the main station. Given the expense of long tunnels under Philadelphia, the slightly less optimal station today should be retained as good enough.
A lower-powered plan providing some HSR functionality, Alternative 2, does not include a new tunnel under Philadelphia, but instead bypasses Frankford Junction. On Appendix A, this is on PDF-pp. 19, 20, and 70. Unfortunately, the bypass is in a tunnel, which appears to be about 4 kilometers. The tunnel has to cross under a minor stream, Frankford Creek, adding to the cost. Instead, I am going to propose an alignment that bypasses the tunnel, with moderate takings, entirely above ground.
In brief, to minimize trip times without excessive construction, it is best to use the highest superelevation and cant deficiency that HSR technology supports today. The maximum superelevation is 200 mm, on the Tokaido Shinkansen (link, PDF-p. 41); there were plans to raise superelevation to 200 mm on the Tohoku Shinkansen, to permit a maximum speed of 360 km/h, but they were shelved as that speed created problems unrelated to superelevation, including noise, pantograph wear, and long braking distances. The maximum cant deficiency on existing trainsets capable of more than 300 km/h is about 180 mm, including the E5/E6 Shinkansen and the Talgo 350 and Talgo AVRIL. Tilting trains capable of nearly 300 mm cant deficiency exist, but are limited to 250 km/h so far. With 200 mm superelevation and 175 mm cant deficiency, speed in meters per second equals square root of (2.5 * curve radius in meters); the minimum curve radius for 200 km/h is then 1,235 meters.
An S-curve requires some distance to reverse the curve, to avoid shocking the train and the passengers with a large jerk, in which they suddenly change from being flung to the right to being flung to the left. If you have ridden a subway, sitting while the train was decelerating, you must have noticed that as the train decelerated, you felt some force pushing you forward, but once the train came to a complete stop, you’d be pulled backward. This is the jerk: your muscles adjusted to being pushed forward and resisting by pulling backward, and once the train stopped, they’d pull you back while adjusting back to the lack of motion. This is why S-curves built a long time ago, before this was well-understood, impose low speed limits.
With today’s computer-assisted design and engineering, it’s possible to design perfect S-curves with constant, low jerk. The limits are described in the above link on PDF-pp. 30 and 38. With the above-described specs, both sets of standards described in the link require 160 meters of ramp. For a single transition from tangent track to a fully superelevated curve, this can be modeled very accurately as 80 meters of straight track plus the circular curve (half the transition spiral is within the curve); the displacement from an actual spiral curve is small. For an S-curve, this requires double the usual transition, so 160 meters of tangent track between the two circles; bear in mind that this distance grows linearly with speed, so on full-speed 360 km/h track, nearly 300 meters are required.
Here is a drawing of two circles and a tangent track between them. The curve of course consists only of a short arc of each circle. The straight segment is a little less than 700 meters, which permits a gentle spiral. The curves have radius 1,250 meters. Takings include a charter school, a wholesale retailer, an auto shop, and what appears to be industrial parking lots, but as far as I can tell no residences (and if I’m wrong, then very few residences, all very close to industrial sites). The charter school, First Philadelphia Preparatory, is expanding, from 900 students in 2012-3 to an expected 1,800 in 2018-9. School construction costs in Pennsylvania are high, and $100 million is expected for a school of that size; see also table 5 on PDF-p. 7 here for national figures. The remaining takings are likely to cost a fraction of this one. Even with the high cost of takings, it is better to realign about 2 kilometers of track above-ground, at perhaps $150 million, than to build 4 km of tunnel, at $1.5 billion; both figures are based on cost items within the NEC Future . This represents a saving of about 83% over Alternative 2, which is projected to cost $116-121 billion excluding rolling stock (PDF-p. 42 of chapter 9 of the EIS).
Given the long spiral length, it may be feasible to avoid the charter school entirely. This would probably require shrinking curve radius slightly, permitting 180 or 190 km/h rather than 200 km/h. However, the travel time cost is measured in seconds: with about 11 km from the end of Zoo Junction to the northern end of Frankford Junction, of which 1 is required just to accelerate to speed, the difference between 200 and 180 km/h is 20 seconds. Further savings, reducing this time difference, are possible if the speed limit without taking the school is 190, or if trains accelerate to 200, decelerate to curve speed, and accelerate again to the north. This option would improve the cost saving over Alternative 2 to about 90%.
The correct way forward for affordable improvement of the Northeast Corridor is to look for ways in which expensive infrastructure can be avoided. If a tunnel can be replaced by a viaduct at the cost of a few extra takings, it should be. If an expensive undertaking can be avoided at the cost of perhaps 10 seconds of extra travel time, then it probably should be avoided. There should be some idea of how much it’s acceptable to spend per minute of marginal travel time saving, by segment: the New York-Philadelphia segment has the heaviest traffic and thus should have the highest maximum cost per unit of time saved. But even then, $100 million for 20 seconds is probably too high, and $100 million for 10 seconds is certainly too high.
Two years ago, when Elon Musk first proposed Hyperloop as a faster, cheaper, and more entrepreneurial alternative to California High-Speed Rail, I explained in depth what was wrong with the proposal. The curve radii were too tight for passenger comfort, and any attempt to fix them would require more expensive civil infrastructure. In general, the cost estimates in the plan were laughably low. Musk has moved on, but another team has been trying to build the system. It is planning to build a test track in the next three years, a distance of 8 km, for $150 million.
Let us analyze these costs. The per-km cost of this scheme is about $19 million, which if costs don’t run over is reasonable for HSR flat terrain, if anything a bit low. California HSR’s Central Valley segments, in more urbanized areas, are about $24-27 million/km, ex-electrification and systems (which don’t add much). This, in principle, suggests the system could be built for about the same cost as conventional HSR. Of course, it’s already far more expensive than Musk’s original estimate of $6 billion for about 650 km (including tunnels), but it still sounds like a good deal – in theory.
In practice, I’d like to go back to my often-quoted sentence in my post from two years ago, that Hyperloop would be a barf ride. The plan is to run capsules at their full speed, but only when empty. Tests with passengers would be restricted to 160 mph, or about 260 km/h. If the picture in the article describing the test track is accurate, the turn looks like its radius is perhaps 800 meters. Passengers can’t ride through this at very high speed. Even at 260 km/h, it requires full canting, and will make passengers feel noticeable extra gravitational push, about 0.2 g.
The importance of this is that any attempt to build tracks at higher speed will run into problems with both horizontal and vertical curves very quickly. The picture depicts sleek viaducts in empty land; imagine much taller viaducts, to allow the track to curve more gently than the terrain. Once the terrain becomes problematic, as it does on the approaches to the mountain crossings from the Central Valley to both the Los Angeles Basin and the San Francisco Bay Area, costs go up. This is true for any mode of transportation, up to and including mountain roads with hairpin turns, but the higher the speed, the larger the cost differential. In this situation, 4 km horizontal curve radii and 20 km vertical curve radii (about absolute minimum for conventional HSR) are expensive; 20 km horizontal curves and 230 km vertical curves are far more so. And within the urban areas, the inability of the system to leverage legacy rail tracks forces expensive urban viaducts.
Update 2016/8/16: the deal is on, per sources at Amtrak; the cost is $2.5 billion, as reported originally.
Update 9/24: as Alex Block notes in comments, sources at Amtrak deny the story, saying that Schumer spoke too soon, and there are still two bidders and Amtrak has not yet made its choice. If the cost turns out to be $1-1.25 billion rather than $2.5 billion, I will withdraw any and all criticism of the procurement process.
A press release from Senator Charles Schumer’s office is abuzz: Amtrak chose Alstom’s bid for its next order of high-speed trainsets, the Next-Generation Acelas. The press release mentions the size of the contract, $2.5 billion, and the number of jobs it would create, 750; it did not include any information relevant to passengers, such as the number of trains, the expected schedule of delivery, the expected frequency, and the expected travel time. Various media outlets have reprinted Schumer’s press release without such additional information, or indeed any analysis. Let me rectify this and provide some background as to why this order is a fleece.
The order is for 28 trainsets with 425 seats each. This can be seen here and here. Of those 28 sets, 25 should be available for maximum service, well below the 98% peak availability achieved by the TGV, but an improvement over the Acela’s current 16 trains available out of 20. There is no mention of the number of cars, which is how orders are usually priced. However, on page 30 of the technical specs, it is mentioned that the maximum length is 200 meters, equivalent to 8 cars. The capacity is equivalent to about six cars’ worth of seating at the normal seat density of economy-class HSR (including the Amtrak Regional coach), or about seven cars’ worth averaged over all occupied Acela cars. The RFP mentions half a bistro car with an option for a full car (page 21 of instructions to offerors), so eight cars per train is a reasonable assumption. I have seen references to ten cars per set, which I believe come from the option for two additional cars per train (the instructions phrase this as “an extra 33.33% capacity”). From Schumer’s press release it’s difficult to know whether the $2.5 billion figure is the base order or also the option.
Eight cars per train times 28 trains equals 224 cars. $2.5 billion divided by 224 equals $11.2 million per car; if I am wrong and these are ten-car trains, then it is $8.9 million per car. In China, a very high-speed train, capable of 350-380 km/h, costs $4 million per car; this is $900 million at the size of Amtrak’s order. In Europe, the new Eurostar order cost a total of €600-700 million for ten 16-car Velaro trainsets, about $4.7-5.5 million per car in PPP terms (see here and here); the uncertainty comes from euro:pound conversion rates and from the fact that a portion of the order is for refurbishment of the older trainsets. Siemens also sold 8-car Velaros to Deutsche Bahn for $5.2 million per car, again in PPP terms. Japanese trains are even cheaper, about $3 million per car in a recent N700 order, but only last 20 years, whereas European HSR trainsets last 40 and Amtrak specified a 30-year shelf life. The only non-US trainset order that I’ve seen that approaches the $10 million per car mark is the Velaro RUS, which is €600 million for eight 10-car trains, and this includes substantial modifications, such as winterization.
There is no excuse for such high costs. The technical specs are not particularly innovative: on page 22 of the document linked above, it is mentioned that cant deficiency should be 127 mm if the trains don’t tilt and 229 if they do, both of which figures are unimpressive by the respective standards of non-tilting and tilting trains. There is no explicit requirement for tilt. There is a requirement that trains be capable of traveling between New York and Washington in 2:21 (current trip time is 2:48) and between New Haven and Boston in 1:51 (current trip time is about 2 hours, skipping New London, which the specs require trains to stop at); there is no mention of which track upgrades are forthcoming, but given Amtrak’s heavy schedule padding, it is not difficult for a good train to meet the requirements. I do not bring these specs up to attack Amtrak for not demanding more of the trains, but to note that what Amtrak is asking is standard, so there is no reason for trains to be unusually expensive.
I will note that due to Buy America provisions, the trains will be manufactured in the US, at Alstom’s factory in Hornell. This has not caused cost blowouts for the large orders made by the New York subway, the LIRR, and Metro-North, but perhaps this order is small enough that requiring Alstom to build it at a new factory leads to major cost increases. It is also possible that due to difficulties in the bidding process, there are fewer bidders than is normal – Bombardier dropped out of the process last year, and in general, some US contracts have just one bid, with correspondingly elevated prices. But regardless of the reason, Amtrak’s order comes at a factor-of-two cost premium, and Schumer just expressed pride at the few hundred jobs that this waste would create.
The Northeast Corridor high-speed rail investment studies are moving forward, and four days ago the FRA released an early environmental impact study on the subject, as part of the NEC Future program. The study moves in part in the right direction, in that it considers many different segment-level improvements (for example, specific bypasses of curvy segments), but it still isn’t quite going in the right direction. It’s not a bad study in itself, but it does have a lot of drawbacks, and I would like to discuss the ultimate problems with its approach.
The EIS studies three alternatives, as well as an obligatory No Build option.
Alternative 1 includes minimal investment: capacity improvements already under consideration, including new Hudson tunnels; grade-separation of at-grade rail junctions, including Shell interlocking between the Metro-North New Haven Line to Grand Central and the NEC, which imposes a severe speed limit (30 mph, the worst outside major city stations) and a capacity constraint; and a limited I-95 bypass of the legacy NEC route in eastern Connecticut, to avoid the existing movable bridges. The bulk of the expense under this alternative, excluding the predominantly commuter-oriented new Hudson tunnels, involves replacing or bypassing obsolete or slow bridges with faster segments. I have advocated such an approach in certain cases for years, such as the Cos Cob Bridge; if anything, Alternative 1 does not do this enough, but I do appreciate that it uses this solution.
Alternative 2 constructs HSR along the NEC route, except for a major deviation to serve Hartford. It is also bundled with various bypasses and new stations elsewhere: under this alternative, Philadelphia and Baltimore get new stations, with extensive urban tunneling to reach those stations. Alternative 3 does the same, but considers more deviations, including a tunnel between Long Island and New Haven, and an inland route through Connecticut, closer to I-84 than to I-95 and the legacy NEC; it also constructs dedicated HSR tracks between New York and Washington.
The EIS does not include cost figures. It includes travel time figures on PDF-p. 51, which seem to be based on unfavorable assumptions: Alternative 2, called Run 5, does New York-Boston in 2:17 for trains making a few major-city intermediate stops; the Alternative 3 proposals vary widely depending on alignment, of which the fastest, the I-84 inland route, takes 1:51, again making intermediate stops.
First, the EIS includes service plan elements, stating the projected frequency of regional and express trains using the tracks. It also talks about clockface scheduling and proposes a pulse in Philadelphia, allowing timed transfers in all directions between local and express intercity trains as well as trains on the Keystone corridor. It goes further and discusses regional rail on the intercity tracks in the alternatives that include extensive new construction. In these ways, it focuses on regionwide rail integration far more than previous plans.
Second, in general, the correct way to think about NEC investment is component by component. The EIS gets closer to this ideal, by considering many different route combinations north of New York, and advancing several of them under the Alternative 3 umbrella.
And third, the concept of Alternative 1 is solid. In many cases, it is possible to bundle a trip time or capacity improvement into the replacement of an obsolete structure at very low additional cost. The example I keep coming back to is the Cos Cob Bridge, but it is equally true of the movable bridges east of New Haven. I also greatly appreciate that Alternative 1 recognizes the importance of grade-separating railroad junctions.
Ultimately, the EIS does not take the three good concepts – integrated service planning, component-by-component thinking, and bundling trip-time improvements when the marginal cost of doing so is low – to their full conclusion. Thus, there is no attempt at running intercity trains at high speed on shared track with commuter rail with timed overtakes, as I have proposed for both the inner New Haven Line and the Providence Line. On the contrary, the plan for capacity investment on the Providence Line includes extensive three-tracking, rather than limited, strategic four-track bypass segments. This cascades to the trip times, which are quite slow between New York and New Haven (1:08, for an average speed of 103 km/h), and a bit slower than they could be between Providence and Boston (24 minutes, whereas about 21 is possible with about zero investment into concrete).
The concepts of Alternatives 1, 2, and 3 represent bundles of levels of investment. This is the wrong approach. Alternatives 2 and 3 include new tunneled city-center stations in Baltimore and Philadelphia; but wouldn’t we want to consider city-center station tunnels in those two cities separately? It’s possible for one to turn out to be cost-effective but not the other. It’s possible for neither to be cost-effective, but for other improvements included in Alternative 2, such as curve modification around Metropark and Metuchen, to pencil out.
There’s far more interaction between different macro-level alignments, by which I mean such questions as “inland route or coastal route?” and “serve Hartford on the mainline or put it on a branch?”, than between such micro-level investments as individual curve modifications and urban tunnels. This means that instead of discrete alternatives, there should be one umbrella, taking in Alternative 2 and 3 variants, proposing all of those options as possibilities. A future study, with detailed cost figures, could then rank those options in terms of trip time saving per unit of cost, or in terms of social and financial ROI. This way, there would be concrete proposals for what a $5 billion plan, a $10 billion plan, a $20 billion plan, and so on would be.
Two elements in the study are inexcusable. First, the service plan description explicitly keeps Amtrak’s current separation of premium-fare Regionals and even-more-premium-fare Acelas. This is not how the rest of the world structures HSR: even when the HSR fares are substantially higher than the legacy rail fares, as in Spain, the fare per passenger-km is not very high, and is not targeted exclusively at business travelers. In France, the intercity fare (including TGVs, which are the bulk of French intercity traffic) was on average €0.112 per passenger-km in 2011. Premium service is provided on the same TGVs as standard service, in first-class cars. In contrast, Amtrak charges about $0.29 per passenger-km on the Regional and $0.53 on the Acela.
And second, the investment alternatives appear to include more tunneling than is necessary. I will focus on the Hartford-Providence-Boston segment in Alternative 2, since it is less sensitive to assumptions on commuter rail track-sharing than the segments overlapping the New Haven Line. It is possible to go all the way from Hartford to the western margin of the Providence built-up area without any tunneling, and without outrageous bridging; see a past post of mine on the subject here, which concludes that it’s better to just go parallel to I-95 for trip time reasons. In Providence, tunnels are unavoidable, but can still be limited to short segments, mixed with elevated routes along pre-impacted freeway corridors. When I looked at it two years ago, I saw an alignment with just 2 km of tunnel, in Providence itself. In contrast, run A in figure 9 on PDF-p. 56 says that tunnels are about 27% of new construction between Hartford and Boston, which consists of, at a minimum, about 100 km of track between Hartford and Providence.
The EIS is a step in the right direction, insofar as it does consider issues of integrated service planning and prioritizing construction based on where it can be cheaply bundled into bridge replacement. However, it fails to consider cost limitations, as seen in the excessive tunneling proposed even in areas where high-speed tracks can run entirely above ground. It’s considering more options, which is good, but, Alternative 1, while representing a golden concept, is not sufficiently developed.
What I would like to see from a study in this direction is a mixture of the following:
- Discussion of how to avoid tunnels, including various tradeoffs that have to be made (for example, above-ground construction may require more takings). Generally, I want to see much less tunneling than is currently proposed.
- A well-developed incremental option, similar to Alternative 1 but more extensive, including for example I-95 bypasses all the way from New Haven to Kingston and along strategic segments of the New Haven Line, such as in Port Chester and Greenwich.
- Greater integration with regional rail; one litmus test is whether the Providence Line is proposed to be three-tracked for long stretches, or four-tracked at a key bypass station (the options are Sharon and the Route 128-Readville segment), and another is discussion of high-acceleration electric multiple units on the Providence Line and the Penn Line.
- Unbundling of projects within each alignment – there is no need to, for example, consider the Philadelphia and Baltimore tunnels together (I also think neither is a good idea, but that’s a separate discussion). The view should be toward an optimal set of projects within each alignment, since macro-level decisions such as whether to serve Hartford are more political than micro-level ones of which curves to fix. This permits explicit discussions such as “would you be willing to spend $2 billion and slow through-trains by 9 minutes to serve Hartford?”.
Except for the first, all are kind of present in this study, but in insufficient amount for me to view it as truly a step forward. The ultimate goal must be HSR in the Northeast on a reasonable budget – closer to $10 or even $20 billion than to the Amtrak Vision’s proposed $150 billion – and this requires carefully looking at which scope is required and which is not. The EIS has elements that can be used toward that goal, but ultimately it is a step sideways, not forward or in the wrong direction.
Twenty-five billion dollars. The New York region’s political heavyweights – Andrew Cuomo, Chris Christie, Chuck Schumer, Cory Booker, Bill de Blasio – all want new Hudson tunnels, without any state funding for them; Schumer is proposing federal funding and a new interstate agency, parallel to the existing Port Authority, and a total budget of $25 billion. This is the highest figure I have seen so far; Amtrak still says $16 billion and Cuomo says $14 billion, and it’s likely the Gateway tunnels are indeed about $16 billion, while the remainder is for associated projects, such as fully four-tracking the line from Newark to the tunnel portal, a distance of about 11 kilometers. It is not my intention to criticize the cost; I’ve done that before.
Instead, I would like to point out that each time Gateway is the news, there usually seems to be a fresh cost escalation. Is it a $10 billion project? A $14 billion project? A $16 billion project? Or a $25 billion project? And what is included exactly? Amtrak does not make it clear what the various items are and how much they cost; I have not seen a single cost estimate that attempts to establish a baseline for new Hudson tunnels without the Penn Station South component, which would provide a moderate short-term boost to capacity but is not necessary for the project. The articles I’ve seen do not explain the origin of the $25 billion figure, either; it may include the tunnel and full four-tracking of Newark-New York, or it may include additional scope, for example Amtrak’s planned vertical circulation for a future (unnecessary) deep cavern for high-speed rail (see picture here).
The main issue here, the way I see it, is the interaction between public trust and political self-aggrandizement. It is common in all aspects of Israeli governance for new ministers to announce sweeping changes and reorganizations, just to remind the country that they exist and are doing something; this generally makes it harder to implement gradual reforms, and makes it completely impossible to do anything by consensus. Implementing a plan that was developed by consensus over many years makes one a bureaucrat; leaders change everything. In the US, this is the case not everywhere in government, but at least within public transportation infrastructure.
As we see in the case of Schumer’s call for a new interstate authority, the changes a heavyweight politician makes in order to appear as a leader have nothing to do with real problems that the project may have. Solving those problems requires detailed knowledge of the project at hand, which is the domain of bureaucrats and technocrats, and not of heavyweight politicians. Even a heavyweight who understands that there is a problem may not know or care about how to fix it: for example, Christie used the expression “tunnel to Macy’s basement,” invoking the deep cavern, to explain why ARC was wasteful, but chose to cancel the project rather than to remove the cavern and restore a track connection from the tunnel to Penn Station, which was in the official ARC Alt P plan until it was cut to limit the cost overruns. Managing a project is hard, and is, again, the domain of technocrats. The heavyweight will grandstand instead, regardless of whether it means canceling the project, or proposing an entirely new layer of government to build it.
As for trust, let us look at the benefits of new Hudson tunnels. The traditional, and least objectionable, is added capacity: the existing tunnels are currently at capacity during rush hour, and there’s much more demand for rail travel from New Jersey to Manhattan than they can accommodate. We can measure this benefit in terms of the combination of increased ridership from more service from more suburban areas, reduced crowding, and possibly slightly higher speeds. As a crude estimate of this benefit, current New Jersey Transit ridership at Penn Station is 87,000 per weekday in each direction. Doubling capacity means roughly doubling ridership, which would come from a combination of induced demand and diversion of traffic from cars, Port Authority buses, and commuter rail-PATH connections. This means the new tunnel can expect about 175,000 new commuter rail trips per weekday. At $10,000 per weekday trip, which is about average for very large non-US cities’ subway extensions, this justifies $1.75 billion. At $20,000, about the same as the projection for Grand Paris Express, Crossrail, and Second Avenue Subway Phase 1, all of which are justified on grounds of ridership and capacity on parallel lines, this is $3.5 billion. At $40,000, about the same as old projections for Second Avenue Subway Phase 2, which I used to analyze de Blasio’s Utica subway proposal, this is $7 billion. A $25 billion budget corresponds to a cost per rider well into the range of airport connectors.
Now, I’d like to think that informed citizens can look at these costs and benefits. At least, the fact that public transit projects only cost as much per rider as Gateway if they’re airport connectors (thus, of especial interest to the elites) or if something very wrong happened with the ridership projections, suggests that there is, normally, a ceiling to what the political system will fund. Even at $14-16 billion, the two states involved and the federal government groaned at funding Gateway, speaking to the fact that it’s not, in fact, worth this much money. In contrast, a bigger project, with bigger benefits, would be funded enthusiastically if it cost this much – for example, California already has almost this much money for high-speed rail, counting Prop 1A funds that are yet inaccessible due to the requirement of a 50/50 match from other sources.
Against this background, we see scare stories that Gateway must be built for reasons other than capacity and ridership. The old tunnels are falling apart, and Amtrak would like to shut them down one track at the time for long-term repairs. The more mundane reality is that the tunnels have higher maintenance costs than Amtrak would like since each track can only be shut down for short periods, on weekends and at night. This is buried in technical documents that don’t give the full picture, and don’t give differential costs for continuing the present regime of weekend single-tracking versus the recommended long-term closures. The given cost for Sandy-related North River Tunnel repairs is $350 million, assuming long-term closures, and it’s unlikely the present regime is billions of dollars more expensive.
I am reminded of the Tappan Zee Bridge replacement: the existing bridge has high maintenance costs due to its age and poor state, but the net present value of the maintenance cost is $2.5 billion and that of the excess maintenance cost is less, both figures well below the replacement cost. The bridge itself is structurally sound, but in popular media it is portrayed as structurally deficient. This relates to the problem of heavyweight politicians, for the Tappan Zee Bridge replacement is Cuomo’s pet project.
More fundamentally, who can trust any claim Amtrak makes about the structural soundness of tunnels? It says a lot that, when I asked on Twitter why transportation authorities do not immediately shut down unsafe pieces of infrastructure, various commenters answered “politics,” and on one (I believe James Sinclair) suggested that Amtrak order an emergency closure of one of the Hudson tunnel tracks just to drive home the point that new tunnels are necessary. I would like to stress that this is not Amtrak or a heavyweight proposing that, but the mere fact that commenters can seriously talk about it is telling. Most of the writers and commenters on the US transit blogosphere are very progressive and hate the Republicans; I have not seen a single comment recommending that the Democrats steal elections, fudge official statistics to make the party look more successful, or arrest Republican politicians on trumped-up charges, because in the US (and other first-world democracies), this is simply not done, and everyone except conspiracy theorists recognizes it. But politicizing the process of deciding which infrastructure projects are necessary for safety purposes and which are simply service expansions is normal enough that people can propose it half-seriously.
This brings me back to the issue of what I want the politicians to do, and what I expect them to do. What I want them to do is to be honest about costs and benefits, mediate between opposing interests (including different agencies that fight turf battles), and make decisions based on the best available information. This would necessarily limit costs, since, from the point of view of a member of Congress, if they get $25 billion for a piece of infrastructure then they cannot get $25 billion for another priority of theirs. They don’t do that, not in the US, and I’ve learned not to expect any better, as have the voters. Instead of working to make $25 billion go a longer way (to put things in perspective, I expect my regional rail tunnel proposal to cost $15-20 billion, at Crossrail 2 costs), Schumer is working to make $25 billion to sound like it’s going to a bigger deal than the new Hudson tunnels actually are.
None of this is a secret. American voters have learned to expect some kind of machine-greasing and politicking, to the point of losing the ability to trust either the politicians or the agencies, even in those cases when they are right. The result is that it’s possible to stretch the truth about how necessary a piece of infrastructure is, since people would believe or disbelieve it based on prior political beliefs anyway, and there is no expectation that the politicians or public authorities making those claims will have to justify them to the public in any detail. Lying to the public becomes trivially easy in this circumstance, and thus, costs can rise indefinitely, since everyone involved can pretend the benefits will rise to match them.
There’s an article in the New York Times by its architecture critic Michael Kimmelman, making a forceful case for the Gateway Project’s necessity. Like nearly all transit activists in New York, I think new Hudson tunnels are the top infrastructure priority for regional rail; like nearly all transit activists, I groan at Amtrak’s proposed budget, now up to $16 billion (but unlike most, I think that it should not be built unless costs can be brought down – I’d peg their worth at $5 billion normally, or somewhat more in a crunch). I would like to explain one specific piece of scope in Amtrak’s plan that can be eliminated, and that in fact provides very little transportation value: Penn Station South.
Like all proposals for new Hudson tunnels, Gateway is not just a simple two-track tunnel between New Jersey and Penn Station. No: the feuding users of Penn Station all think it needs more tracks. The rejected ARC proposal had a six-track multilevel cavern, and Gateway has Penn Station South, a proposal to demolish an entire block south of Penn Station and build seven additional platform tracks. The cost of just the real estate acquisition for Penn South: $769 million to $1.3 billion, at today’s prices. Trains using the preexisting tunnels would have to go to the preexisting Penn Station tracks, which I will call Penn Classic; trains using the new tunnels could go to either Penn Classic or Penn South, but the junction is planned to be flat. For illustration, see PDF-p. 12 of a press release of the late Senator Lautenberg, and a clearer unofficial picture on Railroad.net.
As a result of this proposed track arrangement, train services would initially suffer from the capacity limitations of flat junctions. Like Penn Station’s tracks 1-4, Penn South would be terminal tracks. This means that the only service possibilities are as follows:
1. Schedule all through-trains, such as Amtrak trains, through the preexisting tunnels.
2. Do not schedule any westbound trains from Penn South or any eastbound trains entering the preexisting Penn Station tracks: for example, no westbound trains from Penn South in the morning peak, and no eastbound trains entering Penn Classic in the afternoon peak.
3. Schedule around at-grade conflicts between opposing traffic.
Option #2 is impossible: Penn South has 7 tracks. If trains can enter but not leave in the morning, there will be room for 7 trains entering in the morning, a far cry from the several dozens expected. Option #1 is the better remaining option, but is ruled out, since Amtrak wants to use the new tunnels for its own trains. This leaves option #3, which restricts capacity, and complicates operations. Thanks to Amtrak’s imperialism, taking over regional rail projects for its own ends, Penn South has negative transportation value relative to just building new tunnels to Penn Classic’s tracks 1-4 (the transportation value relative to doing nothing is of course positive).
I emphasize that the negative transportation value of Penn South comes entirely from Amtrak’s involvement. The same infrastructure, used by passenger rail agencies that were more interested in providing high-quality public transportation than in turf wars, would have positive transportation value. However, as I explained to Kimmelman, this positive transportation value is low, and does not justify even the cost of real estate acquisition, let alone that of digging the station.
Briefly, as can be seen in the diagrams, the interlocking between the two new tunnel tracks and Penn’s eleven terminal tracks – tracks 1-4 of Penn Classic, and all of Penn South – is exceedingly complicated, which would limit approach speed, and not provide much flexibility relative to the number of tracks provided. This is to a large extent unavoidable when two approach tracks become eleven station tracks, but it does lead to diminishing returns from extra tracks. This is one of the reasons it’s easier if trains branch: it’s easier to turn 12 trains per hour on two tracks than to turn 24 on four (although both are done in Tokyo – indeed, the Chuo Line still turns 27 tph on two tracks).
Avoiding large crunches like this at urban terminals a benefit of through-running. This is hard to realize initially unless the new tunnel is what I call ARC-North. It’s still possible to through-run trains, pairing the new tunnels with the southern pair of East River Tunnels and the old tunnels with the northern pair, but it requires a lot of diverging moves at interlockings, limiting speed. Penn Station plans should be built with a long-term goal of simple moves at interlockings, to (slightly) increase speed and capacity and reduce maintenance needs.
However, it’s still possible to square the circle by requiring trains to turn fast on tracks 1-5 of Penn Station (track 5 splits to a terminating end and an end that runs through east of New York). Tokyo would be able to turn a full complement of 24 trains per hour on these tracks. Most other cities would not. However, as somewhat of a limiting European case, the RER A turns a peak train every 10 minutes on single track at Le Vésinet-Le Pecq, the next-to-last station on the Saint-Germain-en-Laye branch; Le Pecq has two through-tracks (also hosting a train every 10 minutes) and one terminal track. See map and schedule. This does not scale to 24 tph on four tracks; somewhat tellingly, those trains do not continue to the terminus, which is a three-track station, implying turning 12 tph on three tracks is problematic. The RER E turns 16 tph at the peak at Haussmann-Saint Lazare, a four-track city terminus, pending under-construction extension of the line to the west, which would make it a through-station.
If we accept 16 tph as the capacity of new Hudson tunnels without new Penn Station tracks, then the question should be what the most cost-effective way to raise future capacity is. An extra 9 tph, the equivalent of the difference between 16 tph and the 25 tph that the current tunnel runs and that Amtrak projects for Gateway, is within the capabilities of signaling improvements and better schedule discipline. Again looking to Paris for limiting cases, the combined RER B+D tunnel between Gare du Nord and Châtelet-Les Halles runs 32 tph, without any stations in the tunnel (the RER B and D use separate platforms), while the moving block signaling-equipped RER A runs 30 tph on its central segment, with stations (as do the S-Bahn systems of Berlin and Munich). The RER E was planned around a capacity of 18 tph, but only 16 tph are run today. 18+32 = 50 = 25+25. France is not Japan, with its famous punctuality: French trains are routinely late, and as far as I remember, the RER B has on-time performance of about 90% based on a 5-minute standard, worse than that of Metro-North in its better months.
More importantly, dropping Penn South from the Gateway plan saves so much money that it could all go to through-running, via a new tunnel from tracks 1-5 to Grand Central. This is about 2 km of tunnel, without any stations; in a normal city this would cost $500 million, the difficulty of building in Midtown canceling out with the lack of stations, and even at New York construction costs, keeping the tab to $2 billion should be doable. The 7 extension is $2.1 billion, but includes a station; an additional proposed infill station at 10th Avenue, dropped from the plan, would’ve $450 million, giving us $1.6 billion for about 1.6 revenue route-km, rising to 2.3 km including tail tracks – less than a billion dollars per kilometer.
At $2 billion, the premium over $1 billion of impossible-to-cut real estate acquisition costs is down to $1 billion. It’s unlikely the construction cost of Penn South could be just $1 billion, without general reductions in city construction costs, which would enable the Penn-Grand Central link to be cheaper as well. Each Second Avenue Subway station is about a billion dollars, and those stations, while somewhat deeper than Penn Station, are both much shorter and narrower than a full city block. The result is that building a Penn-Grand Central link is bound to be cheaper than building Penn South, while also providing equivalent capacity and service to a wider variety of destinations via through-running.
One difficulty is staging the tunnel-boring machines for such a connection: building a launch box involves large fixed costs, especially in such a crowded place as Midtown. One of the reasons Second Avenue Subway and the 7 extension are the world’s most expensive subway project per kilometer is that they’re so short, so those fixed costs are spread across less route length. The best way to mitigate this problem is to build the link simultaneously with the new Hudson tunnels. The staging would be done on Penn’s tracks 1-4, whose platforms would be temporarily stripped; the construction disruption involved in the tunnels is likely to require shutting those tracks down anyway. Depending on the geology, it may even be possible to use the same tunnel-boring machine from New Jersey all the way to Grand Central.
This doesn’t save as much money – the Penn-Grand Central link is extra scope, with its own costs and risks. However, unlike Penn South, it is useful to train riders. Penn South allows terminating trains at Penn Station more comfortably, without having to hit the limit of large-city terminal capacity; the Penn-Grand Central link creates this capacity, but also lets riders from New Jersey go to Grand Central and points north (such as Harlem, but also such more distant commercial centers as Stamford), and riders from Metro-North territory go to Penn Station and points west (such as Downtown Newark).
Normally, I advocate unbundling infrastructure projects, because of the tendency to lump too many things together into a single signature plan, which then turns into political football, a sure recipe for cost overruns. However, when projects logically lead to one another, then bundling is the correct choice. For example, building an entire subway line, with a single tunnel-boring machine and a single launchbox, usually costs less than building it in small stages, as is the case with Second Avenue Subway. New Hudson tunnels naturally lead into a new tunnel east of Penn Station, regardless of where this tunnel goes; and once a tunnel is built, its natural terminus is Grand Central.
North Americans are in love with trains that go in highway medians. A large fraction of urban rail construction since World War Two, both light rail and full metro, has used highway medians as cheap at-grade rights-of-way to extend train service, often deep into the suburbs. Some proposed longer-range lines are supposed to go in medians as well: Florida had reserved space in the I-4 median for Orlando-Tampa high-speed rail, and Xpress West planned to go from Las Vegas to the outskirts of the Los Angeles area in the I-15 median. The Texas Central Railway, a private group backed by JR Central planning high-speed rail between Dallas and Houston, is considering several alignments, but markets the route as following I-45 (no mention of median) in some public discussions. In nearly all cases, both urban and intercity, it borders on incompetent to design rail lines in highway medians; intercity lines frequently follow highways on one side, but even that tends to be overrated in American discussions in my experience.
For urban rail, the reason to use highways is that, in most of North America, they’re everywhere, and they’re usually equipped with generous medians and shoulders, allowing relatively cheap placement of rail tracks. Of note, this is generally not the cheapest option: construction on extant (often disused) rail rights-of-way tends to be cheaper. However, in many cases, a rail right-of-way is unavailable, hosts heavy freight traffic, has been permanently turned into a trail, or has commuter trains without integration into the rest of the urban transit network. Examples include the Dan Ryan half of the Red Line and both halves of the Blue Line in Chicago, the Orange and Silver Lines in Washington, the outer ends of BART, the Spadina line in Toronto, and several light rail lines. Often they run on one side of the road, but more frequently they’re in the median, which was often reserved for it when the road was built (as in Chicago and Calgary).
The problem is that nobody wants to live, work, or hang out next to a busy grade-separated road. Living or working a kilometer or two away, with easy access by car, is great for the driver, but within close walking distance, there is just too much noise, pollution, and blight, and the pedestrian environment is unwelcoming. The transit-oriented development in Metrotown and Arlington could not have happened next to a freeway. Christof Spieler frames this as a decision of spending more money on routing trains near where people live versus staying on the easy rights-of-way. But this isn’t quite right: the Expo Line in Vancouver was assembled out of an interurban right-of-way and a city center tunnel, both out of service; the line’s high ridership comes from subsequent development next to Metrotown and other stations.
Other times, the routing comes from a deliberate decision to integrate the trains with cars, with large park-and-rides at the ends. This is common on newer light rail systems in the US (though not Canada, as Calgary prefers integration with connecting buses) and in the Washington and San Francisco suburbs. This makes things even worse, by extending the radius within which the environment is built for cars rather than for people, and by encouraging the same park-and-ride construction elsewhere, along abandoned railroads and greenfield routes, where the preexisting environment is not car-oriented.
I do not want to categorically say that cities should never build urban rail alongside highways. But I cannot think of a single example in which this was done right. Calgary is a marginal case: it did build light rail along highways, and had some success with transit-oriented development, but those highways are arterials rather than freeways, and this makes the pedestrian environment somewhat better.
The situation is somewhat different for suburban rail, but usually the scale of suburban rail is such that there’s not much new construction, only reappropriation of old lines. These lines are long and the environments low-density, making it hard justify the costs of new lines in most cases. Where new suburban rail is built, for examples the Grand Paris Express, and various airport connectors, it is typically in environments with such expected traffic density that the rules for urban rail apply, and we tend to see more underground construction or usage of extant rights-of-way.
The reasons favoring highway alignments intercity rail in the US are somewhat different. Tellingly, HSR in Europe is frequently twinned with motorways. It is not about integration with cars, since those alignments are rarely if ever meant to have major stops in their middle. Instead, it’s about picking a pre-impacted alignment, where there are fewer property takings and fewer NIMBYs. This logic is sound, but I often see Americans take it to extremes when discussing HSR.
The first problem is that roads are almost never as straight as HSR needs to be. The design standards I have seen after briefly Googling give the radius of a motorway capable of about 120 km/h as, at a minimum, 500-700 meters. With these curves, trains, too, are capable of achieving about 120 km/h – less at 500 meters without tilting, more at 700 meters with tilting. The most recent high-speed lines are built with a minimum curve radius of 7 km; about the absolute minimum that can be done, with design compromises and tilting trains, is 4 km. This implies that the trains have to deviate from the motorway alignment whenever it curves. In flat regions the road curves are much gentler than the minimum, but still too sharp for full-speed running. Both Florida HSR and Xpress West noted that the trains would have to slow down whenever the Interstate curved, because the need to run in the median would prevent them from curving gently enough to maintain full speed.
Of note, the European examples of HSR running in motorway alignments have it running alongside the roads, not in the medians. I invite the reader to spend a few minutes following French LGVs on Google Maps and seeing this. This is because there invariably have to be small deviations from the road, which in a rural area are trivial when one runs next to the road but require viaducts when one runs between the road’s two carriages.
There may also be an issue regarding reusing the Interstates. To transit supporters who view HSR as a replacement for freeways, this has an element of poetic justice, or just plain practical reuse of infrastructure they think is obsolete. I chanced upon this while looking up Interstate design standards, but I’ve seen similar proposals elsewhere, as well as dissimilar proposals making use of interstate terminology, as a reminder of past national greatness. It comes from the same place as proposals to reuse auto factories to produce rolling stock: there’s a romantic aspect in addition to or instead of an economic one.
But the most fundamental problem is that the contentious experiences of the freeway revolts and modern-day NIMBYism have soured Americans on any process that involves brazen takings. What I mean by brazen is that carving a new right-of-way, especially through a populated area, looks obvious on a map. In contrast, sticking to a preexisting right-of-way and incrementally widening it or straightening curves is less controversial, even when it involves eminent domain as well, and opposition remains much more local, based on the specific properties being taken, rather than stated in general principles. I am not completely sure why this is so; my suspicion is that widening and straightening are more easily justified as things that must be done, whereas a new right-of-way looks gratuitous.
In either way, Americans have convinced themselves that NIMBYs are a major obstacle to infrastructure construction. While zoning is a notoriously NIMBY-prone process, infrastructure often isn’t. In the English common law world, expropriations are if anything easier than in France, where farmers are especially powerful, or Japan, where rioters threatened to block the construction of Narita Airport. NIMBYs are good at getting their names out in the media, but when it comes to blocking construction, they are relatively powerless; California HSR is facing NIMBYs in the Central Valley, many of whom are conservative and politically opposed to the project regardless of local impact, but so far they have not managed to delay construction.
However, NIMBYs are a convenient bogeyman for public projects, as their motives are openly selfish. They give charismatic, authoritarian leaders the opportunity to portray their infrastructure projects as battles between the common good and backward-looking parochial interests. As I’ve noted multiple times before, New York’s livable streets community (which is similar politically to the set of HSR supporters in the US) tends to overblow the importance of NIMBYs to the point of seeing NIMBYs even when the concerns have nothing to do with NIMBYism: see, for example, the reaction to the opposition of two Harlem politicians to a plan to speed up only the whitest bus route through the neighborhood.
High-speed rail and rapid transit both change economic geography, in that they compress distances along the lines built, emphasizing connections along the lines at the expense of ones perpendicular to them. I’ve written about this before, giving the example of the division of Uptown Manhattan into East and West Sides. In contrast to the similar implications for economic geography, we see different political treatment of transportation planning: rapid transit is usually planned centrally within a city, together with lower-capacity perpendicular forms of public transit, but there is less centralized planning of high-speed rail and connecting legacy lines.
It’s against this background that I’ve read two recent posts on Itinerant Urbanist, one advocating Northeast-wide intercity rail planning, and one expressing skepticism of plans to run trains from New York to Pittsfield along the Housatonic Railroad, whose southern end hosts the Danbury Branch. In the second post, Sandy shows how, even today, it is faster to get from New York to Pittsfield via Albany, along existing Amtrak routes, than it could be via the curvy Housatonic. The trains from New York to Albany are not HSR, but are some of the fastest in the US outside the Northeast Corridor, and that’s enough to obviate the need for some adjacent lines. But we can extend this analysis further, looking at potential HSR routes and identifying the effect on other regional and intercity lines mentioned in Sandy’s first post.
For our main example, consider Providence-Worcester. There is a direct line, the Providence and Worcester mainline, which hosts no passenger trains. I have previously called for running passenger service on the southern 25 km of the line, from Providence to Woonsocket, and integrating the schedules with MBTA trains to Boston and future HSR; in 2009, the Providence Foundation made a similar proposal, finding that it was possible to slot a reasonable frequency of in-state regional trains between the Providence and Worcester freight trains. Superficially, one might think that trains should not turn at Woonsocket, but go all the way to Worcester, a distance of 69 km, providing a key crosstown link in a New England-wide rail network.
The problem is that the presence of HSR makes the line completely useless for end-to-end traffic. HSR averages between 180 and 260 km/h, whereas regional trains average between 50 and 90, with a few trains overlapping with intercity rail going up to 120. This makes it worthwhile to go two to three times as long as the most direct route, if this can be done on high-speed lines.
It’s 70 km from Providence to Boston; from Boston to Worcester, it’s 71 along the present Worcester Line, while an HSR line following I-90 would be about 65, serving Worcester at an outlying station at the intersection with Route 122 (and the Providence and Worcester line), 6 km outside the legacy station. My attempt to work out a schedule for Providence-Boston gives about 20.5 minutes for nonstop HSR; Boston-Worcester is probably similar, giving 41 minutes plus a short transfer time. (Trains with intermediate stops would stop at Back Bay, and if the transfer can happen there, then it saves about 3 minutes total.) Let’s say the transfers at Boston are not optimized, and the total travel time is 50 minutes.
It is not easy to achieve this travel time on the legacy Providence and Worcester line: 69 km in 50 minutes is 83 km/h, and 63 km (from Providence to I-90 and Route 122) is 76. The latter speed is very ambitious, and the former even more so. While there are regional lines in New England that could approach 100, this is not one of them. The line hosts some freight traffic, so it requires additional sidings if passenger trains go at intercity rail speeds and not at regional rail speeds, which are similar to freight speeds. There is a significant commuter market at the Providence end, requiring more stops in Providence and its inner suburbs: the end-to-end travel time in the schedule I constructed for Providence-Woonsocket is 26 minutes, an average speed of 59 km/h. To get to I-90 in 50 minutes, trains would need to average 94 km/h north of Woonsocket; achieving this makes it almost impossible to stop anywhere in Massachusetts except Worcester, which defeats the purpose of the line. Worcester-Woonsocket is not important enough a travel market to reopen a passenger rail line for. For the same reason, there is no hope of achieving sufficient speed by including a mix of local and express trains: there’s not enough demand to support multiple service patterns.
The Providence-Worcester example is somewhat unfair in that it’s unlikely such a line could be activated without interstate cooperation in intercity rail planning. The same cooperation that could restore service on the Providence and Worcester line would first push for faster intercity trains on the Northeast Corridor, which would be the first step in obviating this direct line. I bring this up because it’s a very clean example of how the presence of HSR allows for circuitous routings on some city pairs, and how this should be reflected in rail planning. There are less clean examples, pitting a unified system with HSR as a trunk and branches feeding the trunk against potential in-state projects and priorities:
1. Unless HSR fares are designed to discourage this, the fastest way to get to New York from suburbs far out along the New Haven Line, and to a lesser extent the Northeast Corridor Line in New Jersey, would be to take commuter rail to New Haven or Trenton and then backtrack on HSR. This changes the optimal service patterns, away from express trains to New York and toward local trains in the outer service area, and this in turn influences planning for capacity improvement. For example, fitting HSR and commuter trains on existing tracks in New Jersey probably requires giving up express service south of Rahway, but at the outer end of the line, around Princeton Junction, going out to Trenton and backtracking on HSR would make this not as onerous as commuters may initially think. On the level of station design, the presence of backtracking means that stations may need to be reconfigured to have more access points from northbound to southbound platforms, to make transfers easier.
2. New Jersey Transit has plans from last decade to reactivate passenger rail service along the West Trenton Line. The presence of HSR makes West Trenton a less useful commuter rail station, to either Philadelphia or New York. In Philadelphia it remains useful if one wants to go to destinations on the Reading side of SEPTA, such as Temple University, or even Market East, but in New York, the nearest job center to West Trenton is Newark, which is on the Northeast Corridor. This means that better transit service from West Trenton to Trenton becomes a greater priority than direct rail service from West Trenton to New York.
3. There is a secondary rail line from New London to Norwich, passing next to Mohegan Sun. It is not very useful if intercity trains remain as they are, but the presence of HSR makes it a good feeder, and also allows trains to beat express buses for trips from New York to the casino.
4. It is vanishingly unlikely Pennsylvania will try to build in-state rail service to Erie. However, if it does, Erie-Pittsburgh service would be similar to Providence-Worcester service, with Cleveland fulfilling the same function as Boston in New England.
Many people have heard that certain regions are well-suited for these projects, for example the Northeast Corridor is unusually good for HSR because it links four major cities and several medium-size ones on a single line. By implication, there has to be a flip side, i.e. regions that are poorly-suited for HSR and cities that are poorly-suited for new rapid transit. If there weren’t – if every region were like the Northeast Corridor – then the ridership models would just have higher first-order estimates. Several proposals I’ve seen in comments and on my blogroll in the last few days are in areas where the urban geography makes it harder to justify such projects. These and a few others are the examples I will use in this post.
As usual, there’s a caveat that difficult does not equal bad. Some of these ideas are worth pursuing, but have more challenges that their easier counterparts do not, and if those challenges are solved, then they can perform well. One of the biggest success stories of modern rail investment, the TGV, is in an urban geography that’s not particularly conducive to rail: France’s secondary cities surround Paris in all directions (although Lyon and Marseille are collinear with Paris), the stub-end layout of stations in Paris and many other cities forces awkward branching, Lyon needed a business district to be built from scratch around Part-Dieu. France made this work, and it’s possible some of the projects on this list can be made to work in similar vein.
High-Speed Rail in Sweden
Project: greenfield HSR lines connecting Stockholm with Sweden’s major secondary cities, Gothenburg and Malmö.
The problem: Stockholm, Gothenburg, and Malmö do not lie on a straight line. The three cities are quite small by the standards of more populated countries: Stockholm has a bit more than 2 million people, Gothenburg has a bit less than a million, Malmö has 700,000. A line connecting just two of them, or even a Y-shaped line, is unlikely to get enough ridership to justify the construction costs of full HSR. There are no large intermediate cities: the largest, Linköping, has about 100,000 people. As noted above, French urban geography is not great for HSR, either, but at least the LGV Sud-Est could serve both Lyon and Marseille, and France’s greater population ensures that its secondary cities are large enough to generate enough traffic to fill an HSR line.
As a silver lining, Malmö is adjacent to Copenhagen, and the difficult part, bridging the Øresund, has already been done. While international lines tend to underperform, the tight cultural and economic connections between the Scandinavian countries make it likely that international projects within Scandinavia would be exceptions to the rule. Copenhagen would add another 2 million people at the end of the line. However, even that is unlikely to generate enough ridership to pay for 500-odd kilometers of greenfield HSR (plus a connection to Gothenburg).
Because of its poor urban geography for conventional HSR, Sweden has investigated cheaper solutions, allowing higher speeds on legacy track or on greenfield tracks built to lower standards. As a result, there is research into the possibility of high-speed tilting trains, running faster than the 250 km/h Pendolino. This research is likely to be useful in the UK and US, where the urban geography is better-suited for HSR but fully greenfield construction is obstructed by suburban development near the rights-of-way and by high construction costs, but the original context was faster speeds within Sweden.
High-Speed Rail in the Pacific Northwest
Project: greenfield HSR connecting Portland, Seattle, and Vancouver. This is not officially proposed anywhere that I know; current plans focus on incremental improvements to the Amtrak Cascades. However, every American HSR fantasy map I’ve seen (including the ones I’ve drawn) includes this link, since at least superficially based on city populations it would succeed.
The problem: getting out of the major cities involves a slog on curvy legacy track in areas where it’s hard to straighten the right-of-way. Heading north of Seattle, the route goes along the water, in terrain that is too hilly for an easy inland cutoff all the way to Everett, 50 km north. Getting out of Vancouver is also hard, because of suburban development in Surrey, and becomes even harder if one wants the Vancouver station to be Waterfront rather than Amtrak’s current stop, the less centrally located Pacific Central. The Northeast Corridor is said to have slowdowns near the major stations, leading to proposals to bypass them with new tunnels, but at no point are there 50 nearly-continuous km of low curve radii; the New Haven Line does not look as curvy, while the Shore Line farther east is easy to bypass on I-95.
The Seattle-Portland segment is much easier: the route heading south of Seattle is not constrained, and north of Portland it is possible to run alongside I-5. However, the most important intermediate cities, Tacoma and Olympia, can only be served with exurban stations, since getting into their centers would require the mainline to detour on curvy alignments.
Through-Run Commuter Rail in Chicago
Project: there are many proposals by transit activists to construct new infrastructure to enable through-running on Metra, analogous to Crossrail, SEPTA Regional Rail, the Paris RER, and multiple S-Bahns. Details differ, but other than the lines through Union Station, through-running generally means connecting Metra Electric to some of the lines feeding into Union Station from the north or the Union Pacific lines; UP-North is especially notable for serving dense neighborhoods and not having any freight traffic.
The problem: the layout of the lines entering the Chicago central business district makes it hard to build a coherent network. What I mean by coherent is that commuter lines can make multiple CBD stops to serve different CBDs, or different parts of the same CBD: in New York, a Penn Station-Grand Central connection would let trains serve both the West Side and the East Side. Look at the map proposed by Sandy Johnston, in the second link above: there is no station on the Near North Side, there is no connection from the West Loop stations to the Loop, and effectively lines are still going to be split between lines bound for the West Loop and lines bound for the Loop in the through-run system.
None of this is the fault of any of the people drawing these maps. To serve both the West Loop and the Loop, a line would have to go east-west in the vicinity of Union Station, where there is no legacy line pointing in the right direction. The options boil down to a long greenfield east-west subway, and an awkward transition to the preexisting east-west lines, BNSF (which is too far south) and UP-West (which is too far north), which to add another complication carry heavy freight traffic.
A system prioritizing north-south connections runs into different dilemmas, concerning the tradeoff between service to the Near North Side and easier connections to the rest of the North Side Metra lines. A north-south line connecting UP-North to Metra Electric through the Near North Side would be beautiful, and miss all other Metra lines and most L lines. Sandy’s proposal has Metra Electric swerving west to meet UP-North just north of its terminus at Ogilvie Transportation Center, meeting all L lines and potentially the North Side Metra lines but missing the job centers in the West Loop and Near North Side.
Rail to LaGuardia
Project: construct some rail extension to LaGuardia Airport. Which rail extension varies based on the proposal. The most mainstream proposal, in the sense that it was supported by Giuliani until it was torpedoed by neighborhood opposition, would have extended the Astoria Line east to airport grounds. More recent proposals from various activists have included not just the Astoria Line extension, but also a Northeast Corridor spur, an AirTrain from the Astoria Line, an AirTrain from Jamaica with JFK connections, a subway shuttle under Junction, and a subway running from the airport to 125th Street along the route of the M60 bus.
The problem: all of the above ideas face the same pair of problems. At the airport end, the airport competes with other urban destinations, rather than complementing them by lying on the same straight line with them. An extension from the west, such as the Astoria Line extension, needs to choose between serving the airport and serving the Astoria Boulevard corridor, which has high residential density and no nearby subway service; Astoria Boulevard itself is so wide that as with Queens Boulevard, an elevated line in its middle would be an improvement. Farther east, there is nothing that a LaGuardia extension could be continued to, because of Flushing Bay. An extension across the bay going to Flushing or College Point could be useful, but an extension of the 7 to College Point would be even more useful and avoid underwater tunneling. The bay, and more generally the Long Island Sound, dooms any proposal for a loop returning to the mainline, in the manner of Zurich Airport, while a spur would again compete for capacity with more important lines. Compare this with LAX, which, going along the Harbor Subdivision, is collinear with Inglewood, the Slauson corridor, and Union Station, and would have an easy connection to El Segundo.
At the other end, the question with every airport extension is, what does it connect the airport to? The answer for LaGuardia has to be the Upper East Side, where as I remember most riders originate; but there is no good way of connecting to the Upper East Side, which has no east-west subway line, and shouldn’t, as there are perhaps a hundred kilometers of higher-priority tunnels in the region. A connection to 125th Street is ruled out by the fact that Second Avenue Subway has an even better connection to 125th. The Astoria Line serves the Midtown hotel cluster well, and has a connection to the Lexington trains to the Upper East Side, but I doubt that it can beat a taxi across the bridge in non-rush-hour traffic.
Providence East Side Tunnel
Project: restore rail service through the East Side Rail Tunnel, with a new connection to Downcity at the western end and connections to new or restored rail lines in and beyond East Providence. In Jef Nickerson’s version, the trains are light rail and drop to the surface at the Downcity end. In mine, they continue elevated through Downcity, with a new station replacing Providence Station for both commuter and intercity rail. All versions include a stop at Thayer Street for Brown University service, should one be constructable at reasonable cost.
The problem: there’s no real need for local or regional service from the east along the tunnel (intercity service could be sped up by about half a minute to a minute by avoiding curves in Pawtucket). Light rail service would run into the problem of incredibly spread-out suburbanization east of Providence. Commuter rail would run into separate problems: the legacy lines go along the water in East Providence and don’t serve the town itself well; beyond East Providence, the line going north serves the same suburbs as the existing Providence Line minus Pawtucket, while the line going south would need extensive and costly restoration work to get to Fall River, and only passes through small and low-density intermediate points.
Cutting off Providence Station to move the city’s main station to the south is useful, but the only rail from Providence to Pawtucket and Woonsocket goes due north of Downcity and would be left out of this system. Shoehorning it to the same station that leads to the East Side Tunnel would produce every adverse impact of viaducts on cities: heavy visual impact coming from elevated-over-elevated grade separation, squeal coming from low curve radii, takings of condo buildings near the existing Providence Station.