To the Editor:
Keith Crain's Dec. 13 column ("Do we really need backup cameras?") suggests it is unproven that adding backup cameras to all cars will eliminate people being run over. I bet he's right.
A driver should be using eyes and ears to drive. Looking at the view from a backup camera on a navigation screen -- or even looking at a rearview mirror -- takes a driver's eyes off the full range of activity going on behind the vehicle.
Backup sensors that sound off to alert a driver to an object or person behind the vehicle would free the driver's eyes to look around at the same time.
Backup cameras are great for parking, but beware the unintended consequences of a driver looking at a screen instead of what's out there.