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Author Topic: Signal Poles  (Read 243 times)

roadman65

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Signal Poles
« on: March 19, 2023, 04:37:34 PM »

Thought Id start a topic about signal pole designs.

One that got my attention was the ones that both Louisiana and Texas both use with flat surfaces on a round pole.

Like this. https://www.flickr.com/photos/54480415@N08/52081221812

Also I often wondered why the base on these has that box the same as traditional roadway lighting poles do.
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Sheryl Crowe

Hobart

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Re: Signal Poles
« Reply #1 on: March 20, 2023, 12:36:29 AM »

Gonna jump to one of the weirder examples first, in Juneau Alaska:

https://www.google.com/maps/@58.3703011,-134.5868179,3a,48.9y,115.39h,98.03t/data=!3m6!1e1!3m4!1sLcC_AfiOiGq3XKsWVmnZwg!2e0!7i13312!8i6656

I've always found J-shaped signal poles interesting; they're totally needless, but I guess they get the left turn signal in better eyeshot of the left turn lane?

I've always liked the Alaskan mast arms too, with their gentle upwards slope.

Are trusses fair game for this channel?
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Big John

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Re: Signal Poles
« Reply #2 on: March 20, 2023, 01:33:14 AM »

^^ There are a few instances of J-arms in California as well.
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ErmineNotyours

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Re: Signal Poles
« Reply #3 on: March 20, 2023, 02:34:15 AM »



British Columbia curved masts in storage in Victoria.  One of their distinctive masts appeared in the movie Insomnia, set in Alaska.

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wanderer2575

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Re: Signal Poles
« Reply #4 on: March 20, 2023, 09:08:02 AM »

Gonna jump to one of the weirder examples first, in Juneau Alaska:

https://www.google.com/maps/@58.3703011,-134.5868179,3a,48.9y,115.39h,98.03t/data=!3m6!1e1!3m4!1sLcC_AfiOiGq3XKsWVmnZwg!2e0!7i13312!8i6656

I've always found J-shaped signal poles interesting; they're totally needless, but I guess they get the left turn signal in better eyeshot of the left turn lane?

That's always been my assumption.  A lower signal means the driver need not crane his/her neck to see it.  It's over a median with no traffic, so no clearance issue.
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roadman65

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Re: Signal Poles
« Reply #5 on: March 20, 2023, 09:37:22 AM »



British Columbia curved masts in storage in Victoria.  One of their distinctive masts appeared in the movie Insomnia, set in Alaska.



NASA Causeway in Florida uses j poles.
https://goo.gl/maps/NsYEsjzBRonHUTP39
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Sheryl Crowe

roadfro

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Re: Signal Poles
« Reply #6 on: March 20, 2023, 11:39:51 AM »

Gonna jump to one of the weirder examples first, in Juneau Alaska:

https://www.google.com/maps/@58.3703011,-134.5868179,3a,48.9y,115.39h,98.03t/data=!3m6!1e1!3m4!1sLcC_AfiOiGq3XKsWVmnZwg!2e0!7i13312!8i6656

I've always found J-shaped signal poles interesting; they're totally needless, but I guess they get the left turn signal in better eyeshot of the left turn lane?

That's always been my assumption.  A lower signal means the driver need not crane his/her neck to see it.  It's over a median with no traffic, so no clearance issue.

I've speculated in some thread over on the Pacific Southwest board that the j-shaped mast arm was meant to be a replacement for a turn signal post-mounted at the nose of a median that kept getting knocked down by cars. At least in several of the California examples I've seen, the curved part of the mast arm appears to have been added later. There's also a few examples like this in California where the curved part of the mast arm is over a very narrow median (sometimes just a foot or two wide).
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Roadfro - AARoads Pacific Southwest moderator since 2010, Nevada roadgeek since 1983.

 


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