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Poll

Does your state attach traffic signals to the bridge?

Yes
- 9 (52.9%)
No
- 8 (47.1%)

Total Members Voted: 17


Author Topic: Does your state attach traffic signals to the bridge?  (Read 2722 times)

tolbs17

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Re: Does your state attach traffic signals to the bridge?
« Reply #25 on: December 20, 2021, 04:41:10 PM »

Texas won't do it even when it would make perfect sense to do so.
Our state is the same way... And I don't know what the advantages of attaching signals to the bridge are besides wind.
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7/8

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Re: Does your state attach traffic signals to the bridge?
« Reply #26 on: December 21, 2021, 11:10:38 AM »

I don't think Ontario does this.

- This SPUI in Ottawa has the signals on separate poles (though there are sensors mounted on the overpass).
- Under the Gardiner in Toronto, the signals are on separate poles.
- Even this low railway overpass in Cambridge has the signals on separate poles.
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CardInLex

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Re: Does your state attach traffic signals to the bridge?
« Reply #27 on: December 21, 2021, 04:25:33 PM »

A couple more Louisville, KY entries:

Intersection of Kentucky St at Brook St: https://goo.gl/maps/zcrieWpdiDj4N4pP9 (after further review, this one is actually all span wire just below the bridge—leaving here because it is a weird signal)

Intersection of Preston St (KY 61) at Jefferson St: https://goo.gl/maps/BoHBcs8vG3ggaKir9

Intersection of River Rd at 2nd Street: https://goo.gl/maps/vvCEyuAvQJWMTAK39

Intersection of River Rd at 3rd Street/I-64 off ramp: https://goo.gl/maps/UWB5zQ7XbhM9r5CFA

Intersection of River Rd at 4th Street/Belle of Louisville: https://goo.gl/maps/7nFe1BfZXzC5WUzn6

Advanced signal at intersection of 7th Street/9th Street at Magnolia Ave: https://goo.gl/maps/7kKM9Ui1QuciatNt8

SPUI interchange of 9th Street at Oak Street: https://goo.gl/maps/dLd1vD9M4AdqHNEH8


« Last Edit: December 21, 2021, 04:29:56 PM by CardInLex »
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zachary_amaryllis

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Re: Does your state attach traffic signals to the bridge?
« Reply #28 on: December 21, 2021, 06:16:28 PM »

Advanced signal at intersection of 7th Street/9th Street at Magnolia Ave: https://goo.gl/maps/7kKM9Ui1QuciatNt8


what's the purpose of that signal? is it because the next light is a little obscured until you're right on it? i've never seen anything like that before.
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CardInLex

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Re: Does your state attach traffic signals to the bridge?
« Reply #29 on: December 21, 2021, 06:32:15 PM »

Advanced signal at intersection of 7th Street/9th Street at Magnolia Ave: https://goo.gl/maps/7kKM9Ui1QuciatNt8


what's the purpose of that signal? is it because the next light is a little obscured until you're right on it? i've never seen anything like that before.

Yes, exactly that. There is another one similar to it in Louisville. I didn’t include it because it is not attached to the bridge, but here it is: https://goo.gl/maps/Uqd3e4tpWHGydtF17
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mrsman

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Re: Does your state attach traffic signals to the bridge?
« Reply #30 on: December 22, 2021, 02:58:46 PM »

Advanced signal at intersection of 7th Street/9th Street at Magnolia Ave: https://goo.gl/maps/7kKM9Ui1QuciatNt8


what's the purpose of that signal? is it because the next light is a little obscured until you're right on it? i've never seen anything like that before.

Yes, exactly that. There is another one similar to it in Louisville. I didn’t include it because it is not attached to the bridge, but here it is: https://goo.gl/maps/Uqd3e4tpWHGydtF17

The first example seems too far away from the intersection to be used.  It is like 300 ft away.  Perhaps a flashing warning sign of the upcoming red signal would be better.

The second example is OK.

I wonder if the intersection signals would be more visible here if they were aligned horizontally.
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jdb1234

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Re: Does your state attach traffic signals to the bridge?
« Reply #31 on: December 22, 2021, 03:26:14 PM »

Alabama had one example I can think of off the top of my head.  Before the I-59/20 viaduct was replaced, it had a left exit and entrance to 21st and 22nd Street.  These intersection featured traffic lights attached to the viaduct.  When the viaduct was replaced, this interchange was removed.
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MCRoads

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Re: Does your state attach traffic signals to the bridge?
« Reply #32 on: December 22, 2021, 07:59:46 PM »

I think it’s safe to say that Oklahoma Doesn’t. At all.
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tolbs17

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Re: Does your state attach traffic signals to the bridge?
« Reply #34 on: January 04, 2022, 03:21:43 PM »

Rare find, seems like North Carolina did it back in the early days when SPUI interchanges were introduced. This was done around 1994-1996.

https://www.google.com/maps/@35.2408695,-80.9389043,3a,48.9y,9.45h,93.16t/data=!3m6!1e1!3m4!1sZYAY1Hi1L2ax2eRagtYWYQ!2e0!7i16384!8i8192
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MASTERNC

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Re: Does your state attach traffic signals to the bridge?
« Reply #35 on: January 04, 2022, 07:15:38 PM »

Pennsylvania has also done it occasionally.  This one is at the southern end of the Liberty Tunnel in Pittsburgh.  Note the signals for the intersecting ramp have green arrows and red balls illuminated simultaneously (not permitted anymore) despite newer looking signal heads.

https://goo.gl/maps/9vxcZMrhp7MZQBh88
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roadfro

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Re: Does your state attach traffic signals to the bridge?
« Reply #36 on: January 05, 2022, 11:39:21 AM »

Pennsylvania has also done it occasionally.  This one is at the southern end of the Liberty Tunnel in Pittsburgh.  Note the signals for the intersecting ramp have green arrows and red balls illuminated simultaneously (not permitted anymore) despite newer looking signal heads.

https://goo.gl/maps/9vxcZMrhp7MZQBh88

Also off topic for this thread, but I'm intrigued by the use of blank-out "do not enter" signs (with red beacons) above regular "do not enter" signs for the ramp opposite to this view. Why would the blank-outs be necessary? Going up the ramp in Street View, there's a similar situation with "wrong way" signage. Is there ever a situation where those blank-out signs would turn off?
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