signaling (was signal brackets)

[NW Mailing List]

Rob,
Never having worked on the railroad myself, I will defer your question to
those with more knowledge and real experience.  I'm pretty sure you would
need to find the "prescribed speed" for a given section in the ETT.
Jim C.

On Fri, Mar 29, 2024 at 1:54 PM NW Mailing List <nw-mailing-list at nwhs.org>
wrote:

> Were the “prescribed speed,” “medium speed,” and “restricting speed” MPH
> values in the employee timetable? Were the MPH of those speeds system –
> wide (i.e., medium speed in Norfolk was the same as medium speed in Ohio),
> or did they vary by location? Thanks for your explanation.
>
>
>
> Rob Doorack
>
>
>
> *From:* NW-Mailing-List <nw-mailing-list-bounces at nwhs.org> *On Behalf Of *NW
> Mailing List
> *Sent:* Friday, March 29, 2024 6:49 AM
> *To:* NW Mailing List <nw-mailing-list at nwhs.org>
> *Subject:* signaling (was signal brackets)
>
>
>
> 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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