|My seventy-six-year-old father, while still a good driver, has more trouble judging distances than he used to.
This sometimes results in driving by sound: He hits something, and then realizes it was there.
The cost of repairing rear bumpers was getting expensive, so a perfect gift seemed to be a reverse-sensor kit that gave an audible and visual signal when the car was getting too close to something.
We had it installed, and watched excitedly as Dad backed out of the garage.
The audible signal went off... and he reached for his cell phone.