Smartphones save lives?

Gigaom strolls into a safer future, thanks to car-sensing apps that can help smartphones save lives:

Although both cars and smartphones are filled with sensors, the solution GM is testing doesn’t need any of them. Instead, GM is banking on wireless connectivity; specifically the Wi-Fi Direct standard. Conceptually, cars would be actively looking for Wi-Fi Direct smartphones — and the owners of those devices — and could signal an imminent collision in advance by comparing the two signals up to 656 feet apart.

The concept is similar to Ford’s own vehicle detection system that uses a different Wi-Fi standard, 802.11p, to help cars detect each other.