signaling (was signal brackets)

[NW Mailing List]

Thank you Jim.
A couple questions from even this "Intro to Signals 050" class

Why STOP AND PROCEED and not simply STOP?
Is this because the train has authority and/or there is no oncoming train
in front of it?

Why were the center lights removed from the earlier position lights? Simply
cost savings? It seems like a 3rd light is one extra protection if one of
the others burn out. For that matter (extremely sorry for the tangent), is
there some electrical indication that a signal light is burned out that is
displayed in an operations office, or was it simply reported by crews?

Mike Rector

On Fri, Mar 29, 2024 at 7:48 AM NW Mailing List <nw-mailing-list at nwhs.org>
wrote:

> Mike, et al.,
> Thanks for your attachments.  Several years back, I went through a
> series of posts to try to explain to myself and others how N&W signaling
> was done.  I will try to present some of that information again and if you
> will ask specific questions, I will provide the best answers I can and
> hopefully others will join in the conversations.
> First you have the block occupancy signals also called intermediate I
> believer because they are intermediate to control points.
> These signals have a single arem and can display only three aspects:
>
> CLEAR: both the block you are entering and the subsequent block are
> unoccupied.
> Indication: Proceed at prescribed speed
>
> APPROACH:  the block you are entering is unoccupied, but the subsequent
> block is occupied
> Indication:  Proceed at no greater than medium speed, preparing to stop
> at next signal
>
> STOP AND PROCEED:  the block you are entering is occupied.
> Indication:  Bring your train to a complete stop and then proceed at no
> greater than restricting speed being prepared to stop short of any other
> train or obstruction.
>
> I think these are the easiest to understand and I have included some
> photos of this type of signal.
> Let me know  your questions/comments etc.
> Jim Cochran
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