View Single Post
  #2  
Old 02-07-2012, 06:23 AM
Greg Reid's Avatar
Greg Reid Greg Reid is offline
Ultimate Warrior
 
Join Date: May 2003
Location: Palmetto, GA. USA
Posts: 16,177
Default

Quote:
Originally Posted by David Jones
What's the pucker factor when you notice that the switch isn't where it's supposed to be?
Quote:
Originally Posted by Cobrabill View Post
You have problems getting out of the seat without tearing the fabric.I run in CTC territory where this can't(or shouldn't) happen.
In our system, we have, as switches go, two conditions: Negative correspondence or Positive correspondence. Meaning that the switch's physical position must correspond to the electrical 'call' or request. In other words, if I request the switch to go 'Reverse' and the physical postion is 'Normal', that's negative correspondence.
A switch in negative correspondence = no proceed. I know a transit system's layout is completely different in some respects but I am curious...
Do you guys have anything like that?

__________________
Greg Reid
Palmetto, Georgia