SHJ Interlocking

[Derrick J Brashear]

---------- Forwarded message ----------
From: "Vigrass, Bill" <billvigrass at hillintl.com>
Subject: RE: SHJ  Interlocking
Date: Mon, 19 Jul 1999 12:54:20 -0400


South Hills Junction: I came, I saw, I photographed, Sept. 1948 during
the Washington County Fair.  I do not doubt the several cars per minute.
Bill V.

> ----------
> From: 	Jim Holland[SMTP:pghpcc at pacbell.net]
> Reply To: 	pittsburgh-railways at dementia.org
> Sent: 	Saturday, July 17, 1999 6:17 AM
> To: 	pittsburgh-railways at dementia.org
> Subject: 	Re: SHJ  Interlocking
> 
> Greetings!
> 
> Jim Holland wrote:
> > 
> > Greetings!
> > 
> >         A *Traction Heritage* Xerox (don't know the issue, but it is
> 
> > page 31!!!!!!!) talks about the interlocking at SHJ.  I quote:
> 
> 	"Between 6 a.m. and midnight 1,825 street cars are scheduled 
> through the Mt. Washington tunnel of the Pittsburgh Railways."
> 
> 	Don't know if that is one way for a total of 3,650 both 
> directions or if the 1,825 is a total for inbound and outbound, but
> that 
> works out to be almost 1.7 streetcars  p-e-r  m-i-n-u-t-e  o-n  
> a-v-e-r-a-g-e!!!!!!!  Imagine what this must have looked like in the
> rush 
> hours!
> 
> 	The article goes on to say:
> 
> 	"At the south portal of the tunnel is a wye junction, which is 
> the most important on the entire system. . . Adjacent to the wye is
> the 
> South Hills administrative building of the company, from which all 
> service for the South Side local routes originates, . . . Together
> with 
> these conditions, the topography and the density of service, together 
> with lack of convenient rerouting facilities make this location highly
> 
> important.  It also necessitates a special means of route interlocking
> 
> for the protection of conflicting movements."
> 
> 	This article was written by R. C. Sutton, Supervisor, Signals, 
> Power and Incline Division, Pittsburgh Railways.
> 
> -- 
> James B. Holland
>        PITTSBURGH RAILWAYS COMPANY (PRCo), June of 1949 -- June of
> 1953
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