Could Driverless Cars end Traffic?

Google has been cruising around the US in automated cars for ages, Nevada is passing legislation that is a step toward allowing these machine controlled vehicles to roam the roads and Opel is currently evaluating a study on the impact on safety, congestion and fuel consumption networking cars using Vehicle to vehicle technology would have.

This seems the obvious direction transport is going. Trains, trucks, taxis, aeroplanes and ships are all constantly informing each other where they are, amongst other information so it's natural to assume private vehicles would do the same. Some are already heading that way, augmenting sensory input with other info.

In the interim though, what about person to person? More specifically, phone to phone. Networking smartphones in a way that allows people within a certain area or who share destinations and travel routes to share information. This would allow them to stagger their travel times, carpool, or alert each other of heavy congestion and suggest alternative routes. It could go a long way towards alleviating fuel consumption and reducing traffic congestion, and it wouldn't require any additional infrastructure because it's all in place already.

Someone start working on that, please.