Speed traps?

[bobobb.livejournal.com]

My friend said that she was driving on Broadway last night and saw a bunch of blue lights on video cameras pointed at intersections.  Are these speed traps or cameras snapping pictures of people who run red lights?

Comments

[nalz.livejournal.com]

I think that both things exist. Most streets definitely use magnetic loops. I've only seem the light cameras for emergency vehicles, though. The camera detects the strobe like you said, although I've never heard of buses using them.

This page actually does a good job of showing what the little cameras look like: http://www.milton.ca/fire/fireoperations/signalchange.htm

As an aside to that - There was a guy a while back in Colorado (I think) that had one and used it when he was commuting because he was always running late. It took the city a while to find him but they eventually did because it happened at the same intersections every day around the same time.

Ah, found the article: http://www.news4jax.com/automotive/8768516/detail.html