It would have to be used with other sensors. The radar would “sound the alert”, passing the job of object discrimination to another subsystem. Slowing down might have been good enough in this case.
I've read that as well, but it didn't stop. It kind of leads me to believe the lidar and radar were disabled for whatever reason. Being a test car maybe it had some manual switches that were hit by mistake. I am more inclined to think it was misconfigured by an over the air update or an operator error in the Uber office. We are going to have to wait for a leak or report from NTSB..