Post A Reply
my profile
|
directory
login
|
register
|
search
|
faq
|
forum home
»
RAILforum
»
Passenger Trains
»
Amtrak
»
Trip Report - Sunset Limited
» Post A Reply
Post A Reply
Login Name:
Password:
Message Icon:
Message:
HTML is not enabled.
UBB Code™ is enabled.
[QUOTE]Originally posted by Geoff M: [QB] Interesting reading. Frozen signals could simply mean that they were stuck at red. I don't know where that particular stretch of track is dispatched from, but it's not immediately local (perhaps Spring, TX?). But in any case, the dispatching centre uses non-vital communications to the trackside via either satellite, microwave, or good old telephone to control the switches and signals. All of these are susceptible to interruption - and while communications are disrupted, the trackside safety-critical interlocking defaults back into either its last state, or its most restrictive state - "stop" for signals; locked in their last position for switches. Geoff M. [/QB][/QUOTE]
Instant Graemlins
Instant UBB Code™
What is UBB Code™?
Options
Disable Graemlins in this post.
*** Click here to review this topic. ***
Contact Us
|
Home Page
Powered by
Infopop Corporation
UBB.classic™ 6.7.2
Copyright © 2007-2016
TrainWeb, Inc.
Top of Page
|
TrainWeb
|
About Us
|
Advertise With Us
|
Contact Us