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

[ukelele.livejournal.com]

Or because it's a bike (possible to trigger those with a bike, but hard, and they're inconsistent). Sigh.