The sensor systems might work well as parking aids but they aren't informative enough to tip you to the presence of someone, particularly a small child. Other vehicles have backup cameras ...

When we say “back up camera ... Lifecam Cinema HD camera, which connects to one of the USB ports on the board. Just above that you can see the infrared distance sensor which is connected ...

This parking sensor is mounted to the wall in your garage ... Combining visual and audible warnings, it features a backup camera display embedded into a rearview mirror. When drivers engage ...