NW Mailing List nw-mailing-list at
Thu Jun 29 16:27:11 EDT 2017

Hi Carl


I presume you did not take this photo yourself. It appears to be just a loco
- there is no train. It may be travelling away from the photographer on a
switching move.


Bob Gellatly



From: NW-Mailing-List [mailto:nw-mailing-list-bounces at] On Behalf Of
NW Mailing List
Sent: 29 June 2017 20:23
To: NW Mailing List
Subject: Signals


Who's up for another round of "Signals for Dummies"?


Can somebody explain this:


How can the signal be green when a train is coming?


Carl Woods

Richmond, VA


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