Quote:
Originally Posted by electricron
Rail.corridors with 125 mph operations are usually quad track if the lines are used for other purposes. The northwestern corridor in Great Britain is quad rack where congested, as is America's northeast corridor. Slower trains running on the outside tracks with faster trains running in the middle tracks. Overtaking one another is safer than when faster and slower trains are not running on the same track and avoid being switched onto another track. Unless the Midwest lays quad track rail corridors, you're not going to see 125 mph operations just due to the large differences in train speeds. Additionally, FRA regulations frowns on faster than 110 mph operations on tracks with at grade crossings. Again, the Midwestern states are never going to eliminate at grade crossings along the entire corridors. A few here, a few there, will be eliminated, but no where near enough to affect max train speeds.
I wrote earlier increasing max speeds to what the owners of the corridors will allow. Both UP and BNSF have stated 90 mph as that limit on shared tracks. So, even 110 mph is unlikely on freight owned tracks (the sole exception being Chicago to St. Louis UP owned corridor). 110 mph speeds will only be reached on public owned corridors, ie the Michigan owned line to Detroit.
FEC All Aboard Florida trains will reach 110 mph where their corridor isn't congested, and 125 mph where only passenger trains will be running. That's the best you"ll ever see on a freight owned corridor - and technically where they will be going 125 mph, that section of the corridor will be owned by Florida - FEC will only be leasing it.
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Through the years, I have been confounded at the public's perception of peak velocity versus average velocity when taken between 2 or more points along a dedicated route.
A very straight forward example is a light rail system with a maximum velocity of 60 mph, and takes 20 minutes to go 10 miles, including stops. That's a 30 mph average.
I apologist for being simplistic, but this illustrates the most important step in improving our passenger rail system: the need to increase the average speed through urban areas, including boarding and deboarding at stops, station approaches (through or stub), etc. This is the first area where progress can be made to get the fastest results.
Let's say the freight railroads put a maximum speed of 90 mph even through urban areas which might then be maintained (i.e., 90 mph for a 100 mile stretch for example). If approaches to stations from 90 mph to 0 could be made in say 2 miles on either side of a stop, and, the stop could be made in 2 minutes or less (very routine time length), then for 4 miles out of 104, the average speed would be 15 mph, and the 104 miles traveled in 73 milnutes for an average speed of 85 mph*
I have felt for a long time that what needs to be done is to increase the average speed on all Amtrak routes 1 mph per year.
Amtrak has to take numerous small steps to repair damage caused by property development, tracks being ripped up or downgraded, etc., over almost 60 years.
Amtrak (and the US in general) needs the humble approach. The public rail net work needs to both add new 79 mph routes, and, relentlessly remove bottlenecks to increase average speed. **
*(66.7 minutes for the 100 miles and 6 minutes for the 4 miles in a total time of 72.7 say 73 minutes or 1.22 hours which averages out to 85 mph over that 104 miles).
**in 20 years the change would be very evident.