[PRR-talk] track chart signals/symbols

[Sid Johnson]

Guys,
Be a little careful on this one.  We are looking at a track chart not a
signal diagram so the signal details are often misleading.  Also the third
main track was retired between Custer and Scio (MP75) just before the
publication of this track chart.  Now let's look 4L, 4R and 14L at Custer.
All 3 of these signals plus others were on a signal bridge at one time.
There were 3 maintracks between Custer and Scio.  Tracks 1and 3 were
governed by rule 251 and track 2 was 261.  Custer also had a combination of
both #10 and #15 turnouts.  Does anyone have a signal diagram for Custer
which included East Custer and Scio so we can be a little more definitive?
Sid Johnson

-----Original Message-----
From: Sid Johnson [mailto:srj693 at comcast.net] 
Sent: Thursday, January 10, 2008 5:47 PM
To: 'Rob Schoenberg'; 'John Cooper'; 'Steve Hanlon'; 'PRR-talk'
Subject: RE: [PRR-talk] track chart signals/symbols



-----Original Message-----
From: prr-talk-bounces at dsop.com [mailto:prr-talk-bounces at dsop.com] On Behalf
Of Rob Schoenberg
Sent: Thursday, January 10, 2008 4:18 PM
To: 'John Cooper'; 'Steve Hanlon'; 'PRR-talk'
Subject: Re: [PRR-talk] track chart signals/symbols

Steve,

I'd agree with John's answer.  It looks consistent with the signal aspects
standard plan on my website...
http://prr.railfan.net/signalstandards/standards.cgi?plan=S-601-A  

Rob

-----Original Message-----
From: prr-talk-bounces at dsop.com [mailto:prr-talk-bounces at dsop.com] On Behalf
Of John Cooper
Sent: Thursday, January 10, 2008 4:04 PM
To: Steve Hanlon; PRR-talk
Subject: Re: [PRR-talk] track chart signals/symbols

On 690, the circle on the mast just above the zero represents the lower
marker light that is displayed in a stop and proceed indication.  I can't
make out the other mark on the mast above the nine, but I'm guessing it is a
"G" inside a circle, which would be a grade marker plate.  A "G" marker
plate indicates that trains do not need to stop at a stop and proceed
indication if there is a risk of stalling on a hill.

4L:  I can just barely make out a circle on the lower arm next to the mast.
If so, this would be for a stop and proceed indication.  I see all three
arms represented on the bottom as well.  So Medium Clear, Slow Approach,
Restricting.  Probably Medium Clear and Slow Approach for crossing over to
the RH main.  Restricting otherwise.

14L: Lower arm can only display restricting.  Probably for crossing over to
left track.  I can't make out the circle next to the mast, but I'd be very
surprised if this signal can't display stop and proceed as well.

4R: I only see a vertical and restricting arms in the bottom.  I would have
to conclude that the bottom vertical arm is used for an approach medium
indication rather than medium clear.  It would be highly unusual for a
signal to be able to display medium clear and not slow approach as well.  So
I'd speculate on the following indications: Clear, ApprMed, Appr, Restr,
S&P, Stop.

I would venture the speculation that 4R governs the main track.  A clear
indication could not be displayed leaving the siding through the diverging
side of the turnout.  The question then remains, what governed the departure
from the siding.  All routes into an interlocking must be protected by a
signal, so it could have been a dwarf that simply isn't shown.  Note that
there must have been a 14R for westward movement on the lower track that
isn't shown either - most likely another dwarf.

John

----- Original Message -----
From: "Steve Hanlon" <asciibaron at comcast.net>
To: "PRR-talk" <prr-talk at dsop.com>
Sent: Wednesday, January 09, 2008 8:18 PM
Subject: [PRR-talk] track chart signals/symbols
Guys,
Be a little careful on this one.  Remember that we're looking at track chart
not a signal diagram.  Sometimes that leads to faulty conclusions.  Also,
just prior to the publication of this document the third main track was
removed between Custer and Scio (MP 75) so signals 4R, 4L, and 14L were on a
signal bridge.  Custer had a combination of #10 and #15 turnouts.  Does any
one have an interlocking diagram for Custer?
Sid Johnson

> I'm having a difficult time decoding some track chart signals.
>
> http://asciibaron.dyndns.org/prr/PRR-Custer_signals.JPG
>
> What do the lower symbols on 690 mean?
> What are the possible aspects of the lower signal of 4R, 4L, and 14L?
> Is 4R protecting westward movements out of the siding?
> What signal is governing traffic on the trailing main side if 4R governs
> the siding?
>  From personal observation and a picture in the Hipes & Oroszi Lines
> West (pg 26), this location that has 4L and 14L on a signal bridge, not
> masts as depicted by the track chart.  How accurate are track charts?
>
>
> -Steve
>
> _______________________________________________
> PRR-talk mailing list
> PRR-talk at dsop.com
> http://dsop.com/mailman/listinfo/prr-talk
>

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