I went to Europe for 3 weeks this summer, as well as when we came behind these small white diamonds (some with vast antennae) were commissioned upon most of a intersection lights in my city. What have been these things?
Oh, as well as these aren’t painted. They’re essentially commissioned onto a trade light poles.
Tags: Antennae, Europe, Intersections, Light Poles, Traffic Light
March 6th, 2010 at 5:34 pm
If it’s a diamond painted in the roadway, then it usually implies some sort of car-pool lane or bus-only lane.
If the diamonds are painted within the actual intersection, it usually means “don’t block the box”, which warns people not to get caught in the intersection when the light turns red. Otherwise it can cause gridlock.
As far as a diamond on the actual traffic light, I have no idea. It might be some sort of remote traffic monitoring system with cameras installed, or a camera that catches red-light runners.
March 7th, 2010 at 10:34 pm
I think that they may be signal receivers for emergency vehicles. If an emergency vehicle approaches the intersection and has a transmitter on it, the receiver on the light pole can force the traffic light to go to green so the vehicle doesn’t have to wait at a light.
March 10th, 2010 at 12:08 am
they’re sensors for emergency vehicles and some cities have sensors set to a certain speed to change the lights for oncoming drivers.