[PRCo] Re: 42/38 on Smithfield Yellow-Green Light

[Barry, Matthew R]

Interesting about Boston.   Yes, what the heck does flashing green mean?

Found this about the Pittsburgh yellow-green combo:    http://en.wikipedia.org/wiki/Pittsburgh_left



-----Original Message-----
From: pittsburgh-railways-bounce at lists.dementix.org [mailto:pittsburgh-railways-bounce at lists.dementix.org] On Behalf Of BobDietrich
Sent: Thursday, October 27, 2011 4:17 PM
To: pittsburgh-railways at dementix.org
Subject: [PRCo] Re: 42/38 on Smithfield Yellow-Green Light

So if it is consistency we have why is Boston still flashing GREEN?  I saw that last week and almost wrecked, I didn't know what to do!!!!

-----Original Message-----
From: pittsburgh-railways-bounce at lists.dementix.org
[mailto:pittsburgh-railways-bounce at lists.dementix.org] On Behalf Of Fred Schneider
Sent: Thursday, October 27, 2011 2:31 PM
To: pittsburgh-railways at dementix.org
Subject: [PRCo] Re: 42/38 on Smithfield Yellow-Green Light

It ended when the feds wanted consistency everywhere.   They never managed
to get it everywhere ... Florida and Texas mount traffic lights horizontally to confuse the color blind.  

At the same time New York City scrapped their lights that simply went from
green to red.   Marietta, Ohio used to have green and red lights that
flashed red over green three times as a warning before the green went out.
They also disappeared about the same time.   There were a lot of odd
variants at one time.  Some cities had lights where the green was sequential .... started at the bottom and progressed up a ladder until it turned red.
Seems to me Reading, PA had a version like that back in the 1930s or 1940s
but it was not still around in the 1970s.   



On Oct 27, 2011, at 2:20 PM, Barry, Matthew R wrote:

> No, Bob.  That practice ended in Pittsburgh - I  think in the late 70s.
> 
> -----Original Message-----
> From: pittsburgh-railways-bounce at lists.dementix.org
[mailto:pittsburgh-railways-bounce at lists.dementix.org] On Behalf Of Bob Rathke
> Sent: Thursday, October 27, 2011 2:18 PM
> To: pittsburgh-railways at dementix.org
> Subject: [PRCo] Re: 42/38 on Smithfield Yellow-Green Light
> 
> 
> Don't the traffic lights in Pittsburgh still have the overlapping
green/yellow indication? 
> 
> 
> 
> I recall that in the 1960's Pittsburgh was one of the few (maybe the 
> only)
city in the U.S. with overlapping traffic signals.  Also in that era, Canton, Ohio had simple red & green traffic signals - no yellow. 
> 
> 
> 
> Bob
> 
> 
> 
> ----- Original Message -----
> 
> 
> From: "Matthew R Barry" <mrb190 at pitt.edu>
> To: pittsburgh-railways at dementix.org
> Sent: Thursday, October 27, 2011 12:21:58 PM
> Subject: [PRCo] 42/38 on Smithfield  Yellow-Green Light
> 
> Hi Folks,
> Take a look at this of the 42/38 on Smithfield:
http://www.railpictures.net/viewphoto.php?id=275722&nseq=45 
> 
> Remember when the traffic lights used to give us "green" THEN   "green and
yellow together," then "yellow," and finally "red?"    The photo illustrates
the former green/yellow signal. 
> 
> Matt
> 
> 
> 
> 
> 
>