Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New?
Author: theconductor
Date: 01-10-2018 - 08:36

Dr Zarkoff Wrote:
-------------------------------------------------------
> > Searchlight signals are not allowed with PTC
> anyway.
>
> Never heard this before. The demise of searchlight
> signals in favor of colorlight signals is more a
> case of eliminating redundant relays from the
> signal system, the relays being the searchlight
> mechanisms, and using the relays which control the
> mechanisms to control colorlights directly. Like
> all relays, the searchlight mechanisms are subject
> to periodic testing and have the added dager of
> the maintainer slipping and falling off the mast.
> Installing PTC also involves changing signal
> locations to something a lot furter apart, in
> order to reduce the number of signals to buy,
> install, and maintain.

That's because it's not true. As an example, the Sacramento Sub between Haggin and Binney is PTC with searchlight signals.



Subject Written By Date/Time (PST)
  New NTSB update re: Amtrak 501 OPRRMS 01-09-2018 - 15:11
  Re: New on Jan 4 NTSB update re: Amtrak 501 jst3751 01-09-2018 - 16:11
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? BOB2 01-09-2018 - 16:43
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? WILL 01-09-2018 - 16:56
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? BOB2 01-09-2018 - 17:45
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? OPRRMS 01-09-2018 - 17:41
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? Question 01-09-2018 - 17:47
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? Mark 01-09-2018 - 17:50
  Re: New on Jan 4 NTSB update re: Amtrak 501-Did anyone call the speed restriction when they passed it? BOB2 01-09-2018 - 18:01
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? Joe M. 01-09-2018 - 19:35
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? B6b 01-09-2018 - 19:58
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? tundraboomer 01-09-2018 - 20:17
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? B6b 01-09-2018 - 20:46
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? Dr Zarkoff 01-09-2018 - 22:53
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? theconductor 01-10-2018 - 08:36
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? david vartanoff 01-09-2018 - 22:59
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? OPRRMS 01-09-2018 - 22:00
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? Erik H. 01-09-2018 - 19:33
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? David.Curlee 01-09-2018 - 21:21
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? Dr Zarkoff 01-09-2018 - 22:35
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? David.Curlee 01-10-2018 - 02:09
  Re: New ? Speed Board??? Nudge 01-10-2018 - 17:48
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? Dr Zarkoff 01-10-2018 - 20:17
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? Dr Zarkoff 01-09-2018 - 23:01
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? John Bruce 01-10-2018 - 09:36
  Re:And you're not a synonym for stupid, with a really stupid comment like that? Just sayin' 01-10-2018 - 10:12
  Re: New on Jan 4 NTSB update re: Amtrak 501-Not Much New? OPRRMS 01-10-2018 - 10:23
  Re: New on Jan 4 NTSB update re: Amtrak 501 OPRRMS 01-09-2018 - 17:39
  Re: New on Jan 4 NTSB update re: Amtrak 501 Berg 01-09-2018 - 19:42
  Re: Railfans versus Railroaders? BOB2 01-10-2018 - 10:00
  Re: Railfans versus Railroaders? BOB R 01-10-2018 - 15:49
  Re: Railfans versus Railroaders? George Andrews 01-10-2018 - 16:26
  Re: Railfans versus Railroaders? A C-5 Bob BOB2 01-10-2018 - 17:08
  Re: Railfans versus Railroaders? Nudge 01-10-2018 - 17:54
  Re: Railfans versus Railroaders? Commenter 01-10-2018 - 18:07
  Re: New on Jan 4 NTSB update re: Amtrak 501 jst3751 01-10-2018 - 09:57
  Re: New on Jan 4 NTSB update re: Amtrak 501 OPRRMS 01-10-2018 - 10:12
  Re: New NTSB update re: Amtrak 501 Thanks for the link. 01-10-2018 - 12:07


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