Old 12-13-2006, 06:16 PM   #1
photogeek88
Senior Member
 
photogeek88's Avatar
 
Join Date: Feb 2006
Posts: 111
Send a message via AIM to photogeek88
Default Ex-C&NW Cab Signal Operation

Could somebody direct me to a site or explain the operation behind the signals on the former C&NW Main Line through Illinois and Iowa? I know that the C&NW used cab signalling, and near my local trainwatching spot in Dixon, Illinois, I often see trains sitting just short of the road crossing. Am I correct in assuming that they are sitting at a spot where a block is located, and marked with the cab signals? I also assume that that explains why there only seem to be signals in the vicinity of crossovers. Thank you to anybody who would be willing to explain this, or even better, have a track diagram!
photogeek88 is offline   Reply With Quote
Old 12-14-2006, 12:31 AM   #2
J
Senior Member
 
J's Avatar
 
Join Date: Jan 2004
Posts: 532
Default

Cab signals operate via electrical pulses traveling through the rails. Depending on the installation, they are augment wayside fixed signals or may replace them except at control points. As with a standard block signal system the track circuits that operate the cab signals blocks are separated by insulated joints.

It is likely that the stationary trains you have seen are holding back at crossings to allow vehicles to pass and not stopped at a particular place for cab signal operation. Here is a link that will give you a little more information.



http://www.sdrm.org/faqs/rulebook/acs1a.html
J is offline   Reply With Quote
Old 12-19-2006, 02:35 PM   #3
CNW4404
Member
 
CNW4404's Avatar
 
Join Date: Sep 2004
Location: Kenosha, WI
Posts: 52
Send a message via AIM to CNW4404
Default

As stated on Don Strack's excellent Utahrails site...

Quote:
Automatic Train Control (ATC) is used between Chicago Passenger Terminal (CPT) and Council Bluffs. It was installed around 1926, and consists of a two-aspect color indication in the locomotive cab (green or "clear" and red-over-yellow or "restrictive")Except at interlockings and their approaches, there are no wayside signals along this route.
See more for yourself at http://utahrails.net/cnw/cnw-roster-notes.php
__________________
Chris Keating
Kenosha, WI
CNW4404 is offline   Reply With Quote
Old 12-19-2006, 08:46 PM   #4
photogeek88
Senior Member
 
photogeek88's Avatar
 
Join Date: Feb 2006
Posts: 111
Send a message via AIM to photogeek88
Default

Thanks Keats!
photogeek88 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT. The time now is 02:44 AM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.