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Originally Posted by electricron
Let's take a closer look at a new New York City to Chicago HSR service. Let's assume initial service is a train every half hour, hopefully even more frequent after a few years in service.
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I have nothing to gain from HSR between New York and Chicago; merely highlighting that the journey could be done in circa 4hrs*, or even well below that as I will set out.
Quote:
Originally Posted by electricron
Where in Chicago would you initiate and end an extra 4 trains per hour, 40-60 trains a day, from? Both Union and Pennsylvania Stations are "at capacity". It's not like there is an existing unused abandoned train station decaying away in either city one could use.
So we build brand new train stations. Where? How big?
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4tph terminating is not particularly taxing; two platforms could accommodate that based on international turnaround of HSR services, but you’d realistically want more for redundancy and future growth. The changes to Chicago Union/LaSalle St and New York Penn outlined below would enable more dedicated HSR platforms.
A few posts earlier I highlighted the issues and raised solutions to provide capacity at New York Penn. Chicago presents several potential options, each of which would require tweaking. Millennium is probably too far out of the way and a new terminal would have to be underground or require an expensive land-take, which leaves Union or LaSalle St; the latter would be my preference.
Chicago Union is the existing Amtrak terminal and the busiest commuter station in Chicago, but it exhibits many of the same issues seen at New York Penn, namely too many unnecessary terminating services and completely inadequate narrow platforms. A few years back I looked at commuter services in Chicago and other cities; at rush-hour, 16tph and 14tph approach Union from the north and south respectively. Reducing and widening platforms and making them through-running for rationalised Metra services would – regardless of any HSR – deliver a substantial capacity gain. There would then be more than enough for several HSR platforms.
LaSalle St is served by a solitary Metra commuter rail line, but has good transport connections to Downtown and beyond via the Chicago L. My thinking would be to divert the existing Metra route into Union and convert LaSalle St into a dedicated HSR terminal. LaSalle St would also enable extensive OSD.
Quote:
Originally Posted by electricron
Now let's assume you build an entirely new HSR corridor between Chicago and New York City? Which route? How about I-80 just as an example? It's 796 highway miles between Chicago and New York City via I-80. it's 11.5 hours by car. For a HSR train to travel that far in 3 hours, it would have to average 265 mph. (796/3 = 265 mph) Not even close to being possible
In 4 hours it would have to average 199 mph (796/4 = 199 mph) Possible as a non-stop train only if the cities and states in-between allow it and the train never slows down for anything.
In 5 hours it would have to average 159 mph (796/5 = 159.2 mph)
More probable as trains can now slow down when required
In 6 hours it would have to average 132 mph. (792/6 = 132 mph)
Most probable and the most likely result because the trains can now make multiple stops in route.
6 hours is twice as long as the 3 hour sweet spot where trains lose market share to planes worldwide. Do I need to reinforce that point with NEC ridership data again? At least now you can attract riders not wishing to go all the way for almost 800 miles.
So, why spend $100 billion+ for a new HSR line and new train stations when the vast majority of riders will still choose to fly?
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Out of my own curiosity, I mapped out a very rough route which incorporated existing or former rail corridors, sections of the I-80 and other highway corridors, and then tunnel/viaduct under more problematic sections. Throw in a Cleveland stop and maybe two others, and using HS2* journey speeds, you would get a Downtown Chicago to Midtown New York journey in just over 4hrs*.
NEC Amtrak ridership is certainly low but there is scope for credible growth if there was a suitable HSR route, especially when you factor in the large catchment. The existing Acela journey speeds are around a third that of HS2*, using HS2 journey speeds you would be able to do New York to Washington and Boston in 67mins and 68mins respectively.
NEC intercity passenger ridership is most certainly below that elsewhere, but 80mn intercity journeys is not an outlandish figure. For some context, in 2019-20 there were 143mn intercity rail journeys (Eurostar adds another 11mn) made across the UK; a figure expected to rise to 345mn by the 2040’s. 80mn journeys thus would still be quite low.
* To date, I have referenced HS2 average journey speeds of 186mph/300kph, however I ought to clarify that those figures relate to the journey between London and Birmingham (a relatively short distance by HSR standards) which incorporates two intermediate stops. I just worked out the journey speeds between London and Manchester – a longer distance incorporating an additional intermediate stop – and the average journey speed increases to
200mph/322kph. If using London to Manchester as the basis – a longer distances comparable to the US – New York to Chicago would be well below 4hrs.