Not exact matches
It beeps in tones of increasing frequency as the
car nears an
obstacle.
Other electronic safety aids include front and rear parking sensors that alert the driver with a chorus of beeps when the
car is too
near to an
obstacle — and are also activated by people crossing the road in front of the
car.
There's also the use of radar as a warning system for «
near obstacle detection» that would alert the driver to vehicles in or approaching the lanes on either side of him and keep him from pulling into the path of another
car.