It does. In the recent cars I've driven (no SUVs though), the sensors do trigger at a distance you already do see from the vehicle, and the warning gets far mor

It does. In the recent cars I've driven (no SUVs though), the sensors do trigger at a distance you already do see from the vehicle, and the warning gets far more aggressive the closer you get. It even turns on the camera, if you're <30 kph and it's in its probable FOV (i.e. rear sensors).