Cell phones, computers, and tablet devices are already capable of sending and receiving data. So why not cars as well?
Individual cars could essentially act as data points on a network. These kinds of networks could have immediate benefits to drivers, who would be quickly rerouted in the event of a congestion-inducing incident before traffic can build to the point of adding significant delays. These data can also help consumers decide whether driving really is the best option on a given day or if public transportation offers a more efficient means of conveyance.
In the long term, daily commuter information, traffic patterns and incident reports can be used to help transportation officials and city planners determine future roadworks and safety projects.
Since no one can expect to see a fully realized and integrated transportation communications network arriving in their neighborhood anytime soon, iterative changes to existing roadways using relatively low-tech alternative could provide an interim solution.