NW Mailing List nw-mailing-list at
Thu Aug 15 22:21:11 EDT 2013

Agree that a series would be great. Rules and signals changed, so an
article for each period when a given standard was in use would be

Jeff Cornelius

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-----Original Message-----
From: NW Mailing List <nw-mailing-list at>
To: nw-mailing-list <nw-mailing-list at>
Sent: Thu, Aug 15, 2013 04:46 PM
Subject: Re: Signals

You took the words right out of my mouth! I am trying to get the
system on my railroad ready to install. However all the rules and such
have got
me just plain confused! An article laying it all out for the late
steam era would be a huge help!!!!!
Ray Russell Sr.
In a message dated 8/15/2013 1:42:00 P.M. Eastern Daylight Time,
nw-mailing-list at writes:
Or a series of articles for the Arrow........just a thought.
Jim Brewer
"NW Mailing List" <nw-mailing-list at>
To: "NW
Mailing List" <nw-mailing-list at>
Sent: Thursday,
August 15, 2013 10:20:16 AM
Subject: Re: Signals
Jimmy is correct. PRR signal aspects are similar in appearance to some
N&W aspects, but that is where the similarity ends. The N&W had
different rules for their aspects and how they apply.
Older N&W rules had two horizontal yellows over a single marker. That
was replaced later with a single horizontal over a marker light with the
letter "S" attached to the interlocking number board on the signal. 
is just one example of MANY differences.
It gets complicated, and it would take a great deal of time to explain
of the signal subjects that have been brought up lately. That's why I
chimed in on them.
Maybe I should write a book...
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