That unusual noise you hear when a hybrid car is backing up is actually a federally mandated feature aimed at improving safe operation of these quiet vehicles.

A nearly silent car moving through a parking garage or crowded street might seem like a sign of modern engineering. But that quietness has forced regulators to rethink how vehicles signal their ...

Kia has been granted a patent for a driver assistance system that includes speakers on a vehicle to output omnidirectional and directional sounds while reversing. The system helps identify obstacles ...