There are two kinds, one based on radar and one based on stereo camera. The radar systems have to ignore static items or they’ll detect overhead road signs as h

There are two kinds, one based on radar and one based on stereo camera. The radar systems have to ignore static items or they’ll detect overhead road signs as hazards and brake erratically. This is why Teslas run into static obstacles. The camera systems OTOH can handle static items. Our 2017 Suzuki Kei car has a stereo camera system and it will brake if you’re about to run into a car stopped at a red light.