Parking camera sensors can scan the vehicle’s surroundings for objects when the driver initiates parking. Audio warnings can notify the driver of the distance between the vehicle and its surrounding objects. Typically, the faster the audio warnings are issued, the closer the vehicle is getting to the object. These camera or radar sensors may not detect objects closer to the ground, such as parking stops, which is why parking sensors typically work alongside backup cameras to assist the driver when reversing into a parking spot.