Since buying my car, I have never once had my car detect, slow down or stop for a car stopped at a traffic light or traffic jam in my lane. Maybe it might have but I never waited that long. Just to be sure, I have tested it to the point where I had to brake so hard, things flew forward - so even if it works after that point, it's not practical for me. Btw, it works perfectly if the car is moving in front me - just never gets a lock on a stationary car if I am approaching it at a non-trivial speed (40 MPH or more). Is my front facing radar somehow busted? I wouldn't think so because in all other situations it works perfectly. Or is this how it's supposed to work?