RE: But..
Absolutely they did. One suburb north of Denver had to remove them. Multiple rear-enders nearly every day - carnage. Finally they traded the revenue for safety. They also had problems with the same sensors detecting someone in the far right lane with their bumper over the white line by a couple of inches (waithing to turn right on a red) and giving them a red light ticket. Complete scam. The City of Aurora is still holding on to them - they can't quite give up the revenue...no matter what it costs....