what is this?
02-07-2009, 08:52 PM
#1
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what is this?
i see these on tons of traffic lights and never knew what they are? they can't be red light cameras cause they are everywhere and they don't have that many red light cameras:
http://www.its.umn.edu/Publications/...oute-light.jpg
http://www.its.umn.edu/Publications/...oute-light.jpg
02-07-2009, 08:53 PM
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I think thats the car sensor. not sure on the technical term, but it tells that there are cars at the light, and aides in the computer deciding when to change the lights colors.
I think.
I think.
02-07-2009, 08:57 PM
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they must do something like that, cause they have one of the little "radar" things with them that is white and points down at the line so they must go hand in hand ive just always been curious to know what they are exactly
