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Posted: 7/18/2008 5:31:01 PM EST
So anybody know what the deal is with the yellow reflectors they are putting around the edge of the traffic lights? I don't get it and it looks like it cost alot of money
Link Posted: 7/18/2008 7:00:09 PM EST
If I remember correctly it's a very resonable cost to add thes. During power outages at night time hours, it helps motorists identify dead intersections. In turn trying to reduce accidents. Retroreflection is key!
Link Posted: 7/18/2008 8:14:05 PM EST

Originally Posted By Leatherlids:
If I remember correctly it's a very resonable cost to add thes. During power outages at night time hours, it helps motorists identify dead intersections. In turn trying to reduce accidents. Retroreflection is key!


That's exactly correct. Backplates in the past were installed on signals to enhance contrast, especially when seen against bright sky. The addition of retroreflectivity to the backplate is to enhance nighttime visability should the signal malfunction or the power fails. Expect to see more of this as new signals are installed or retrofitted.
Link Posted: 7/18/2008 8:22:29 PM EST

Originally Posted By John_H:

Originally Posted By Leatherlids:
If I remember correctly it's a very resonable cost to add thes. During power outages at night time hours, it helps motorists identify dead intersections. In turn trying to reduce accidents. Retroreflection is key!


That's exactly correct. Backplates in the past were installed on signals to enhance contrast, especially when seen against bright sky. The addition of retroreflectivity to the backplate is to enhance nighttime visability should the signal malfunction or the power fails. Expect to see more of this as new signals are installed or retrofitted.


Signal Tech?
Link Posted: 7/18/2008 10:19:09 PM EST
my wife noticed them long before i did. I like em, personally. Although i don't understand why there isn't some blinking red battery powered LED system set up that automatically runs when the power goes out. i guess yellow reflective tape is cheaper than a battery and some LED lights, though...
Link Posted: 7/19/2008 5:48:48 AM EST

Originally Posted By Leatherlids:

Originally Posted By John_H:

That's exactly correct. Backplates in the past were installed on signals to enhance contrast, especially when seen against bright sky. The addition of retroreflectivity to the backplate is to enhance nighttime visability should the signal malfunction or the power fails. Expect to see more of this as new signals are installed or retrofitted.


Signal Tech?


Transportation Engineer
Link Posted: 7/19/2008 9:24:07 AM EST
Its probably costing us 25X more than it should but still its not too bad. Seems better then LED's and a batts. that stuff requires maintanence.
Link Posted: 7/19/2008 2:34:33 PM EST
So far, it HAS helped me notice one stoplight, when I otherwise woulda driven right through the intersection.
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