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Author Topic: What are these?  (Read 455 times)

TheArkansasRoadgeek

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What are these?
« on: November 14, 2017, 09:31:05 PM »

So I though these (the boxes) were prohibiting left/right turn LED setups, but judging from other photos, maybe not. They seem way small for the size of such arrows that are used. They could be receivers, Van Buren has one on a mast facing Main St. It looks like something that would light up, but I guess not.
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GaryV

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Re: What are these?
« Reply #1 on: November 14, 2017, 09:36:43 PM »

Maybe sensors for emergency vehicles, so the light changes to green for them?  As I recall, it works on some kind of coded signals, microwave or infrared, proprietary to the police and fire.
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Baloo Uriza

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Re: What are these?
« Reply #2 on: November 14, 2017, 09:39:28 PM »

So I though these (the boxes) were prohibiting left/right turn LED setups, but judging from other photos, maybe not. They seem way small for the size of such arrows that are used. They could be receivers, Van Buren has one on a mast facing Main St. It looks like something that would light up, but I guess not.

Most likely your first assumption is correct, given that there's a corresponding one on the right end of the mastarm over the street parallel to the railroad tracks.  Older blackout signage.
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Mapmikey

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Re: What are these?
« Reply #3 on: November 14, 2017, 09:55:34 PM »

So I though these (the boxes) were prohibiting left/right turn LED setups, but judging from other photos, maybe not. They seem way small for the size of such arrows that are used. They could be receivers, Van Buren has one on a mast facing Main St. It looks like something that would light up, but I guess not.



If you go to this angle (https://goo.gl/maps/amYW8etksRn - choose May 2014) there is a train blocking the road and if you zoom in it appears the small black box is illuminated.  So I too believe these are prohibition signals that come on whenever there is a train.

Most likely your first assumption is correct, given that there's a corresponding one on the right end of the mastarm over the street parallel to the railroad tracks.  Older blackout signage.
« Last Edit: November 15, 2017, 06:10:57 AM by Mapmikey »
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TheArkansasRoadgeek

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Re: What are these?
« Reply #4 on: November 14, 2017, 10:05:21 PM »

Maybe sensors for emergency vehicles, so the light changes to green for them?  As I recall, it works on some kind of coded signals, microwave or infrared, proprietary to the police and fire.
Couldn't they just use an antenna?

Also, I thought they were blackout boxes, But I saw several in a recent thread that were much larger. interesting... :hmmm:
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Baloo Uriza

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Re: What are these?
« Reply #5 on: November 14, 2017, 10:09:16 PM »

Maybe sensors for emergency vehicles, so the light changes to green for them?  As I recall, it works on some kind of coded signals, microwave or infrared, proprietary to the police and fire.
Couldn't they just use an antenna?

Also, I thought they were blackout boxes, But I saw several in a recent thread that were much larger. interesting... :hmmm:

I'm pretty sure they're blackout signs made from a McCain pedestrian signal housing.
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Mdcastle

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Re: What are these?
« Reply #6 on: November 14, 2017, 10:40:35 PM »

IR receivers for emergency vehicle pre-emption look nothing like that, they're a small black cylinder with a tube sticking out in the direction it's supposed to receive from.

These are 16" pedestrian housing. In days past they used to be used as blankout signs (notably by California for "Meter On" signs.) I'm guessing these light up "No Left Turn" and "No Right Turn" when a train is going buy.
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Baloo Uriza

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Re: What are these?
« Reply #7 on: November 14, 2017, 11:51:58 PM »

IR receivers for emergency vehicle pre-emption look nothing like that, they're a small black cylinder with a tube sticking out in the direction it's supposed to receive from.

Exactly, like a small ready-to-drink coffee can with a pair of pitot tubes sticking out.
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Brandon

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Re: What are these?
« Reply #8 on: November 15, 2017, 10:54:32 AM »

They look like light up no left/right signs given the railroad tracks next to them.  At this angle, with the train there, they appear to be lit: https://goo.gl/maps/v6ByRFqPNGs  Here's some from Illinois: https://goo.gl/maps/qhK813vctDm
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kphoger

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Re: What are these?
« Reply #9 on: November 15, 2017, 01:39:06 PM »

They look like light up no left/right signs given the railroad tracks next to them.  At this angle, with the train there, they appear to be lit: https://goo.gl/maps/v6ByRFqPNGs 

Especially when you enhance the GSV:
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abc2VE

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TheArkansasRoadgeek

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Re: What are these?
« Reply #11 on: November 18, 2017, 05:40:56 PM »

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Baloo Uriza

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Re: What are these?
« Reply #12 on: November 18, 2017, 11:28:55 PM »

Here's a better shot of one from RVA

https://www.google.com/maps/@37.5734867,-77.483601,3a,15y,324.19h,100.54t/data=!3m7!1e1!3m5!1sw1UrmTh7GRc-_s_xlM4SKQ!2e0!5s20110801T000000!7i13312!8i6656
Now, I wonder if the one I posted is texted based or symbol based. It could be either...

If it's a McCain or similar housing, probably text based.
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