signaling (was signal brackets)

[NW Mailing List]

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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