by EM2000
Automatic's cannot display a stop indication.
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ExCon90 wrote:I'm really puzzled by the track and signal diagram posted by sullivan1985. First, it says the eastward signal at SPARROW is an automatic controlled by NYSW Cooperstown; to me that means a controlled home signal which when cleared by the dispatcher automatically displays whatever indication is consistent with the route established. Second, why is the NYSW in control of a signal governing entrance to MN territory? It seems to me that if MN were given control of the signal at SPARROW, the signals at WX could be done away with entirely; I can't imagine a circumstance in which, given the presence of the grade crossing, you would allow an eastbound train to pass SPARROW unless it could keep on going. If the eastward signals at WX are displaying Stop, what else could the signal at SPARROW display?Look closer in the diagram. There is a period separating all the notes on CP SPARROW in the diagram. It is not intended to read that the Eastbound signal is controlled by Cooperstown. I'll admit a design flaw in trying to represent the information. My mistake.
SecaucusJunction wrote:Why would there be a spring switch on the cripple track? Is it ever really used?The cripple was once an exit from the yard when there still was a yard here. Both spring switches are still present.
ExCon90 wrote:Thanks for posting (and taking!) those. That 3rd one was the view I was hoping to see. What puzzles me now is that with a number plate on that signal there would appear to be nothing to prevent a train from accepting a Stop-and-Proceed (since the number plate makes S&P its most restrictive indication) when WX is at Stop, thus blocking the crossing. Is there a Special Instruction requiring trains receiving a S&P to wait at that signal for verbal authority to proceed? Also, why would separate signals be needed just because two dispatchers are involved? Examples exist for joint control of signals (Rule 261 between two block stations for example, where the block operators at each end have to agree on the direction of traffic before either of them can clear a signal)? And I don't see why an NYSW dispatcher would object to giving MN authority to move a train off his railroad. If MN were given control of that signal, the eastward signals at WX wouldn't be needed (as it is now, does SPARROW display Medium Approach and Medium Clear when one/two blocks are clear beyond WX?).I'm not sure of any special instructions as they do not appear in NJT time tables. If the NYSW has a special instruction about this location, I am not aware of it. Then again, CP-WX is not in service yet and won;t be for some time so as of right now no special instruction is required. Currently NYSW trains check in with the Main Line dispatcher when they reach Millrift, PA and are given verbal permission to accept the signal and enter NJT/MN territory at CP SPARROW. The first signal the train will encounter is the automatic just west of the PA Crossovers (soon to be retired when CP-PA is cut in).
ExCon90 wrote:OK--I missed the bit about WX not being in service yet. Sounds like it will all be cleared up when they get the whole system in place.Should be up and running by the end of 2016 from what I gather.
SecaucusJunction wrote:Again? Hopefully back to where it was originally at the erie depot...
I'm assuming the Port Jervis station platform is going to be relocated?