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| Re: 1970 Employee ''RR'' Fourth Avenue Line Timetable (1535449) | |||
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Re: 1970 Employee ''RR'' Fourth Avenue Line Timetable |
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Posted by randyo on Wed Jan 15 01:39:31 2020, in response to Re: 1970 Employee ''RR'' Fourth Avenue Line Timetable, posted by New Flyer #857 on Tue Jan 14 20:49:58 2020. In my post, I neglected to mention that 11 St is still used as a timepoint on the N and R timetables although when I was still working there it wasn’t printed out. The reason for that was with a system as complicated as the NYCTS, there are many locations where adjusting timetable to clear one line with another, might now create a conflict with another line it merges with. The M/N/R/W mergers is a good example. Although a problem of the same complexity no longer exists N/B since the G no longer operates into Qns Plaza allowing an R to proceed into the station and be held to clear an M, S/B is a bit different. If a S/B R were to be held at Qns Plz to clear an N or W it might interfere with an M. To solve that problem, a hold is scheduled at 11 St to allow the R to clear the M but allowing it to be held just north of the 11 S switches to clear an N or W coming from Astoria. When the Gs were still running into Qns PLz, the R would have to be held N/B between 11 S and Qns Plz to clear both Astoria and Qns Blvd service so on paper, 11 St is where the “hold” would take place even though in reality the train would probably be waiting just S/O Qns Plz. Of course as I mentioned, since 11 St is no longer printed on the timetable, it is in a sense an “invisible” hold. There are a few other places on the system where an “invisible”or sometimes a visible hold is placed at an interlocking point to help clear a train that has to merge with 2 conflicting services. |
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