| A computer makes it all work right --- also the computer serves as an event recorder, timing when the gates went down. Usually gates are timed to be down 30 seconds before train occupies the street crossing for a particular track speed |
| Date:
5/12/2006 |
Location:
Cumberland, RI Map  |
Views:
210 |
Collection Of:
 
Ron Chouinard |
|
Author: Ron Chouinard
|
 |
| Picture Categories: |
This picture is part of album: Relay Shed |