Im Making An (1) Train Schedule

[Wolpe]

You need to consider the type of train you are scheduling for, and it mustn't intersect with the schedule of other trains so as not to mislead and avoid a possible accident if they run on the same railway line.

[Wolpe]

You need to consider the type of train you are scheduling for, and it mustn't intersect with the schedule of other trains so as not to mislead and avoid a possible accident if they run on the same railway line. Express trains also require a separate schedule because they have a higher speed. On dbauskunft.com is a fairly well-structured chart that considers all external factors, possible delays, traffic speed. You can get inspired if it helps you with something.

[engineerboy6561]

On 3/26/2017 at 10:45 PM, RailRunRob said:

Well, that might put a hex on that plan. 

If I recall correctly Tibbetts brook runs right underneath that ROW, and the current plan is to try to daylight it along the old ROW because right now it flows into the Broadway sewer and takes up a meaningful chunk of the capacity of the Wards Island water treatment plant (~2-3% on a dry day, likely significantly more during the rains), thus contributing to combined sewer overspill into the East River. The idea would be to separate it from the sewer system at Van Cortlandt Park and run it down the old ROW into the river with a trail alongside it. You could build a train up that way, but you'd probably want to run it above the Deegan in the median if you want to use that area, and then once you get below River Park Towers maybe you could take a couple of tracks out of the High Bridge Yard for a tunnel portal.

At that point your stations would wind up being 145 St (underground), 155 St (underground, maybe connect to  ), 167 St, Cross-Bronx Expressway, Burnside Av, Fordham Rd, Kingsbridge Rd/225 St, 231 St, and 238 St or Van Cortlandt Park South, with heavy modifications to the Lenox Yard leads to let you still use Lenox Yard. You'd likely get Riverdale ridership via the Bx10, and you might get a fair number of people willing to walk the block and a half from Broadway to the Deegan at 238 St and 225 St, and having Fordham Rd as a transfer point would take some of the congestion off the and the upper . It would likely be a faster ride than the upper , and it would take a load off the Bx40/42 and the  from transfers at Tremont. It sounds good in theory, and solves at least some of the trouble with blasting additional tunnels under the existing Broadway line (plus having the line run elevated from High Bridge Yard onward should significantly reduce construction costs over adding new tunnel space from 145 to Dyckman); I'm just not sure how viable it is.

Like that's a solid cheaper fix for the bottleneck on the  than new tracks under Broadway (I'm figuring that 3/4 mile of tunnels and four miles of elevated track with a few stations is gonna be cheaper than three miles of new tunnel (from 137 to Dyckman), plus reconfiguring 137 St to an express stop, adding additional even deeper platforms to 168 St, and figuring out what to do about Dyckman St). 

Trying to do conjoined subway/rail running on shared tracks is not going to work even if we ignore all the regulatory and infrastructure hurdles involved in doing that, because the speed differential between rail and subway is high enough that you're not going to be able to run them together without capping headways for both services far below where you want it (during peaks the Port Washington branch of the LIRR runs at 6tph (three local, three express) and there's probably not room for more than 10-11tph total using that arrangement. Now consider that the Hudson Line takes up 10tph for peak service, and you're left with 1tph you can use on the subway line (which is ridiculous), and I don't think the Hudson Line ROW has room for more tracks.

Edited January 27, 2022 by engineerboy6561