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| Re: Chaining? (761219) | |||
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Re: Chaining? |
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Posted by randyo on Mon Mar 23 15:03:39 2009, in response to Re: Chaining?, posted by MainR3664 on Mon Mar 23 10:23:13 2009. The problem with IRT track numbering is that MOW uses a different system from RTO. In IRT signal Dept numbering the S/B tracks have even numbers and the N/B tracks have odd numbers. Thus the S/B lcl tk is Tk 4, the S/B exp tk is Tk 2, the N/B exp tk is Tk 1 and the N/B lcl tk is Tk 3. RTO merely designates the tracks from west to east as 1, 2 ,3 and 4. On IRT signal plates, the last digit of the signal number is the track number but these numbers are based on the MOW track numbering system rather than RTO so it gets a bit confusing. Middle tracks, spurs and signals in reverse dirctions carry last digits that are unrelated to the actual track number and I'm not sure how that works. Maybe someone out there who works for NYCT signals can explain it better. Branch lines usually carry the numbers of the mainline tracks that lead to them. Thus Bway tracks N/O 96 St are 1 and 4 while the Lenox WPR tracks are numbered 2 and 3. On the East Side, Jerome tracks are 1 and 4 while Pelham tracks are 2 and 3. This despite the fact that the service to Pelham is local and the services up to Jerome and WP Rd are express. Self contained lines like Flushing and the Manhattan els are merely numbered 1 and 2 an all middle tracks are called "M." Again the signals use a different numbering system with which I am not really familiar. |
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