[PRCo] Signal styles

Sun Aug 7 09:31:13 EDT 2016

Tell Chris a million thanks!

On August 7, 2016 9:19:43 AM EDT, "Edward H. Lybarger" <trams2 at comcast.net> wrote:
>I asked Chris Walker at Port Authority for clarification.  He sent the
>following:
>
>The "International" signals govern rail traffic in two locations - the
>Overbrook line merge with the South Busway at South Hills Junction, and
>the grade crossing with Castle Shannon Boulevard. These display a
>horizontal bar for stop, and a vertical bar for proceed. Both are tied
>in with the cycles of regular, three-aspect traffic signals at their
>respective locations. They're designed to provide the transit operator
>with instructions while not confusing motorists at road/rail
>intersections.
>
>These signals are not found on the Beechview line - they were strictly
>a Stage II thing. 
>
>I think the "clear on top" signals in question are the regular lineside
>spacing signals on the Red Line. With a couple exceptions, these are
>not found on Overbrook, as Blue Line cars run on cab signaling between
>Willow and South Hills Junction.
>
>Hope that helps.
>
>Chris
>
>Ed
>
>-----Original Message-----
>From: Pittsburgh-railways
>[mailto:pittsburgh-railways-bounces at mailman.dementix.org] On Behalf Of
>James Keener via Pittsburgh-railways
>Sent: Saturday, August 06, 2016 10:22 AM
>To: George W. Gula; Western PA Trolley discussion; George W. Gula via
>Pittsburgh-railways; Herb Brannon
>Subject: Re: [PRCo] Signal styles
>
>The red and blue lines seem to have a majority of the upsidedown
>traffic signal style. The semaphore-lights-in-a-traffic-signal-body
>seem interspersed through. One driver called the later "international
>style" bit I wasn't able to find more info.
>
>On August 6, 2016 10:09:02 AM EDT, "George W. Gula via
>Pittsburgh-railways" <pittsburgh-railways at mailman.dementix.org> wrote:
>>While I¹m not sure just why they are different, I can hazard a guess.
>>The
>>Beechview (Red)Line opened in 1987 and the the Blue line opened in 
>>2002.
>>That¹s abut 15 years difference and both the available technology and 
>>the Bidders changed during that period. PAT wrote their specs and the 
>>bidders placed bids based on what was available at the time. I don¹t 
>>think there is anything historical involved here.PAT just wanted a 
>>product at the low bid, as required by law.
>>
>>
>>George Gula
>>
>>On 8/6/16, 9:51 AM, "Pittsburgh-railways on behalf of Herb Brannon via
>
>>Pittsburgh-railways" <pittsburgh-railways-bounces at mailman.dementix.org
>>on
>>behalf of pittsburgh-railways at mailman.dementix.org> wrote:
>>
>>>Jim,
>>>I can tell you all about what was going on in the PCC era, however,
>>you
>>>will need to find someone who is more knowledgeable about the current
>>era
>>>to answer your question. I seldom ride the T these days inasmuch as I
>
>>>really don't live near a station. I have to drive from Brentwood down
>>to
>>>Castle Shannon or Washington Jct to find a parking lot for the T so
>>it's
>>>easier and faster to drive into the city and park at Station Square
>>then
>>>ride from there to the main downtown.
>>>
>>>Bruce Wells, if you know him, may know about the current signal
>>system.
>>>
>>>On Fri, Aug 5, 2016 at 8:17 AM, James Keener via Pittsburgh-railways
>< 
>>>pittsburgh-railways at mailman.dementix.org> wrote:
>>>
>>>> I've been commuting by rail and have noticed at least two distinct
>>style
>>>> of signal, color-light-clear-on-top on the red line and  
>>>>position-light-clear-on-bottom near south hills junction. Are there 
>>>>others?
>>>> Are these historical accidents of who installed them or is there
>>some
>>>> significants to the type of display?
>>>>
>>>> Jim
>>>> --
>>>> Sent from my Android device with K-9 Mail. Please excuse my
>brevity.
>>>>
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>>>
>>>
>>>
>>>--
>>>*Herb Brannon*
>>>
>>>*In Pittsburgh...........A City and*
>>>*..........................A State of  Mind *
>>>
>>>
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>>
>>
>>
>>
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>
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>
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