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Portable Signals

Portable Signals

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These signals are located on both ends of a long bridge that is under construction.The bridge is on a county road in a very rural area and has been reduced to one lane.The signals stay on red until the first person reaches the bridge and then they get to go first.

PICT0037.jpg PICT0022.jpg PICT0448.jpg PICT0837.jpg

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Filename:PICT0448.jpg
Album name:slaidblade / signal lights
Keywords:Lanterns
File Size:199 KB
Date added:Feb 19, 2009
Dimensions:1024 x 763 pixels
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Date Time:2008:11:25 08:47:21
DateTime Original:2009:01:18 03:07:07
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Raphael
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Feb 20, 2009 at 11:26 AM Author: Raphael
very interesting. Do you the manufacturer?




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Feb 20, 2009 at 11:29 AM Author:
i've heard of Lanes being added to a Bridge but never Reduced!
FGS
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Rory Mercury!


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Feb 20, 2009 at 02:15 PM Author: FGS
There is a single lane bridge somewhere in Silver Springs dunno what road it is. There is a pair of permanent traffic lights at each end of the bridge. It turns to green when one way can go ahead and cross it. It goes to yellow then red. The other side turns green so the other way's turn. Doesn't matter who get there first. If it's yellow then you have to wait till it turns green.

It's a very interesting experience having two concrete walls very close to the car. (Like the subway. The underground train kind not the sandwich place. )

Why I like LEDs on top of other lighting tech?
LEDs = Upgrade 95% of the applications. (That is if you avoid eBay's LEDs).


LED brainwash? No, people uses them cuz they work well for them.

slaidblade
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Feb 20, 2009 at 03:19 PM Author: slaidblade
Raphael,i do not know the manufacturer,...Form109,I'm not sure if you're joking?..it's a two-lane bridge and it's not being permenantly reduced,it's just that they can only work on one lane at a time unless they close down the whole bridge.
Ash
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Sep 28, 2011 at 01:26 PM Author: Ash
What kind of ensor is used to detect cars ? EM wire loop / light ray / air pipe / something else ?
slaidblade
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Sep 28, 2011 at 02:51 PM Author: slaidblade
i don't know.. I'm sure this construction has long been completed.
icefoglights
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ITT Low Pressure Sodium NEMA


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Sep 28, 2011 at 05:44 PM Author: icefoglights
I found a set of these in use on the Dalton Highway on Alaska's North Slope, over 300 miles (over 480 km) from any other traffic lights. They were being used where culverts were being dug up and replaced under the highway. On the back side of the signals was an amber light. When a light was green, the amber light on it's back side would flash. They appeared to use IR sensors, though I'm not sure how they were linked.

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