NW Mailing List nw-mailing-list at
Thu Aug 15 16:28:36 EDT 2013

You took the words right out of my mouth! I am trying to get the signaling
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

From: "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. That is just
one example of MANY differences.
It gets complicated, and it would take a great deal of time to explain some
of the signal subjects that have been brought up lately. That's why I
haven't chimed in on them.
Maybe I should write a book...

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