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| Re: Second Av Subway Ridership Growing Rapidly (1426269) | |||
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Re: Second Av Subway Ridership Growing Rapidly |
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Posted by Stephen Bauman on Thu Feb 2 12:23:14 2017, in response to Re: Second Av Subway Ridership Growing Rapidly, posted by Michael549 on Thu Feb 2 11:11:17 2017. In the midst of the #6 Pelham Bay Express trains using the middle track and merging west of the station to the downtown track along with Parkchester local trains - a series of trains are also supposed to use the middle track/platform to terminate and relay trains at the peak am rush hour periods. I doubted it.I doubted it due to the layout of the station and the amount of trains traveling through there at certain times, especially the busy am rush hours. If you check the station layout, you will note there are switches both east (north) and west (south) of the station. Expresses can merge onto the local north of the station. This will leave the middle track free for short turning locals without interfering with through service. You will note that in your own schedule from 6:20m until 8:40am - THERE ARE NO - ZERO trains that depart from 3rd Ave-138th St." First, this is not "my own" schedule. It's taken from the GTFS schedule on the MTA's website. Second, what's important is whether the operation is feasible not what the MTA's current practices might be. The feasibility issue rests on the gap between a short turned train and a leading or following through one. That gap is 2 minutes for the desired 30 tph. When that positive demonstration occurs is immaterial because the short-turning does not affect through service. I showed that 8:40 leaving 3AV (9:02 GC arrival) did prevent its follower, the 8:20 express from Pelham, from maintaining that 2 minute gap. |
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