i spoke with angie schmidt, an editor at street blog u.s.a. as you just heard from gabe kline, angie told me that while they may lead to more rear end accidents, they reduce t bone accidents. >> sears loss of injuries, those are red light run being collisions, t bone collisions, not rear end fender benders. the vast majority of the scholarly research shows these are effective. >> remember chicago is just coming off of this parking meter scandal if you will, where it seems the city is so desperate for revenue they'll outis source ideas to people. moody's called the decision credit-negative for local treasuries. so part of the issue here, the heart of the issue is not necessarily the stuff you study which is whether or not the red light camera is safer for intersection, but the ham-fisted way with which chicago has once again handled this. >> i greap there hav agree. there have been problems in chicago. one thing we recommend is communities have to be careful the way they roll these out. a lot of people feel very passionately obviously about thi