middle siding signals

Wed Apr 19 16:19:40 EDT 2017

Jim,

     I have managed to enlarge the photo somewhat.  I see the signal for 
eastbounds on the westbound main is set at stop and stay. But I think i 
see additional lights that would allow it signal to display "advance 
approach", "approach diverging" and "diverging clear"in addition to the 
usual "clear", "approach" and "stop and proceed".  But keep in mind, 
just because there are signal heads that could display those additional 
aspects, it does not mean they had the wiring to do so.  We don't know 
why that the "restricting" aspect cannot be displayed. The wiring for 
such an aspect could have been too expensive to include in the opinion 
of the head of C&S. The center siding may not have been on a circuit and 
special instructions in the employee timetable rules instructed that any 
move pass through that siding at restricting speed. I'd try to find an 
emp tt from that time to see what it dictated, then we can reconvene if 
necessary.

\    WJPowers


On 4/19/2017 11:44 AM, NW Mailing List wrote:
> Mr. Powers,
> Thank you for your response.  I understand your comments on 
> geography.  My remaining question is why would it be advantageous to 
> allow an Eastbound movement to proceed at restricted speed on the 
> East-bound main and not be advantageous to do so for an Eastbound 
> movement on the West-bound main?  The layout of the middle siding 
> appears to by symmetrical with respect to both mains and I am trying 
> to understand why the signalling should be different.
> Thanks for your help,
> Jim Cochran
>
> On Wed, Apr 19, 2017 at 8:26 AM, NW Mailing List 
> <nw-mailing-list at nwhs.org <mailto:nw-mailing-list at nwhs.org>> wrote:
>
>     Jim,
>
>         A restricting signal indicates the right to proceed at a
>     restricting speed. That aspect does not deal with geography, it
>     deals with trains ahead and track circuit continuity. It sits one
>     position above "stop and proceed", which only deals with trains
>     ahead - you must stop and then proceed at a restricting speed.
>     Below that is "stop and stay". If there is a yellow plate with the
>     letter "G" on it below the signal head displaying "Stop and stay"
>     on the mast, a train on an ascending grade can pass the signal
>     without the stop, ready to stop short of a train ahead. All the
>     above very fine delineations of keeping your speed safely in check.
>
>         From the photo, I cannot tell what track the furthest EB
>     signal controls. If it has a dummy mast to one side of it, it may
>     control the center siding, and most likely be like an interlocking
>     home signal and not have any aspect allowing a stop and proceed.
>
>         Wm J Powers
>
>
>     On 4/19/2017 6:54 AM, NW Mailing List wrote:
>>     I believe the attached photo may show the West end of the middle
>>     siding at Villamont (confirmation would be appreciated).  My
>>     question concerns the East-bound signals that are visible.  The
>>     signal for the East-bound main is capable of displaying the
>>     RESTRICTING aspect while the one for the West-bound main is not. 
>>     In my understanding, one reason for the RESTRICTING aspect was to
>>     allow a train to proceed without coming to a complete stop on  a
>>     grade where it might have been very hard to start again.  Since
>>     this stretch is signalled for bi-directional running, why would
>>     the signal for the West bound main not also be capable of showing
>>     RESTRICTING?  It seems like the grade would have been the same
>>     for East-bound movements regardless of which main they were
>>     using.  Any thoughts?
>>     Thanks, Jim Cochran
>>
>>     Moderator:
>>     http://www.nwhs.org/mailinglist/2017/20170419.midpasside.jpg
>>     <http://www.nwhs.org/mailinglist/2017/20170419.midpasside.jpg>
>>
>>
>>     ________________________________________
>>     NW-Mailing-List at nwhs.org <mailto:NW-Mailing-List at nwhs.org>
>>     To change your subscription go to
>>     http://list.nwhs.org/mailman/options/nw-mailing-list
>>     <http://list.nwhs.org/mailman/options/nw-mailing-list>
>>     Browse the NW-Mailing-List archives at
>>     http://list.nwhs.org/pipermail/nw-mailing-list/
>>     <http://list.nwhs.org/pipermail/nw-mailing-list/>
>     <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon>
>     	Virus-free. www.avast.com
>     <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link>
>
>
>     <#m_9056830978163597122_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>     ________________________________________ NW-Mailing-List at nwhs.org
>     <mailto:NW-Mailing-List at nwhs.org> To change your subscription go
>     to http://list.nwhs.org/mailman/options/nw-mailing-list
>     <http://list.nwhs.org/mailman/options/nw-mailing-list> Browse the
>     NW-Mailing-List archives at
>     http://list.nwhs.org/pipermail/nw-mailing-list/
>     <http://list.nwhs.org/pipermail/nw-mailing-list/> 
>
> ________________________________________
> NW-Mailing-List at nwhs.org
> To change your subscription go to
> http://list.nwhs.org/mailman/options/nw-mailing-list
> Browse the NW-Mailing-List archives at
> http://list.nwhs.org/pipermail/nw-mailing-list/


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist6.pair.net/pipermail/nw-mailing-list/attachments/20170419/25e65f7a/attachment-0001.html>