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Comment by lawguy | Hacker News Reader

> Hell one of the reasons passenger trains is shit in the US is that passenger rail does not get priority over freight

They do have priority:

> (c) Preference over freight transportation. -- Except in an emergency, intercity and commuter rail passenger transportation provided by or for Amtrak has preference over freight transportation in using a rail line, junction, or crossing...

http://codes.findlaw.com/us/title-49-transportation/49-usc-s...

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Passenger rail is supposed to have priority by law, but in practice they don't always get it. Freight carriers don't always yield, enough so that there are ongoing legal battles. You can check Amtrak's historical On-Time Performance and causes of delay here: https://www.amtrak.com/about-amtrak/on-time-performance/

My quick sampling of ~10 trains came up with an average around 65% on-time during the last year. The only one I've ridden, the California Zephyr, is less than 50%.

http://blog.amtrak.com/2015/02/message-amtrak-regarding-time...

http://trn.trains.com/news/news-wire/2017/03/24-judge-sides-...

http://www.jconline.com/story/money/2017/08/24/csx-digs-its-...

Yeah I've ridden the Zephyr from Chicago to Colorado (and back) a few times, and it was off-schedule about half the time, one of them was at least 4 hours of just sitting there in the train in the middle of nowhere.

One hour I can understand, four is ridiculous. The trip is pleasant and the views are great but for me to take it again they're going to have to do better than 50% on-time.

I used to live on a small town on the Empire Builder line a few hours west of Chicago. It was once a day each way, and we'd get one direction in the morning, and the opposite direction in the afternoon. Or that was the theory. Often the morning train was so late that when you heard them sound the horn you wouldn't know if it was the afternoon train or the "morning" train.

The "Late Shore Limited" I've taken has on-time performance of ~50% and train interference as 50% of delays. That sounds about right.

Apparently, according to your 2nd cite, that law was determined to be unconstitutional.

Sounds like something that could be enforced by giving the passenger trains the ability to lock out switches further ahead of them. Like, say, an hour ahead of them. (Though, without signalling the particular switches that lower at-grade crossing guards. It’d be a rather fraught thing to engineer, all-told.)

Sure, you couldn’t run densely-packed passenger trains very well on such a system... but they’re not densely-packed. If they were, the system would have been a success and could then be turned off. ;)

This is starting to sound like distributed systems ... how do you prevent deadlock? https://wiki.openttd.org/Deadlock :-)

What happens is that the freight trains gives Amtrak a window for its timetable. In that window, Amtrak gets priority. Miss the window, and Amtrak has to wait for freight trains. There's a separate issue that some freight operators will decide to screw Amtrak over (even within their nominal window) and just eat the fines instead.

In Tucson AZ it was a constant problem that freight trains would either blow through town at full speed or crawl through level crossings blocking traffic rather than obeying speed laws. It was always cheaper for them to pay the fines than to comply.

I read "priority" from the GP as "commercial/investment priority".

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