It's pretty standard that cars nowadays take in a lot of information. Cars are outfitted to receive radio, GPS, OnStar, and some are even being designed to be logged onto the internet as they drive. Now the opposite is being proposed: cars that send out information as they drive.
Cars could become like individual sensors for services like snowplows, ambulances, and police. They could even be set up to send information about the location of potholes whenever a car hits one to help road crews better repair roads.
For example, many cars are outfitted with anti-skid systems. When several cars in the same area swiftly brake and the anti-skid system is turned on, a signal would be sent out from each car to a central location, which would interpret the signals as icy road conditions.
This new plan could even be designed to help authorities determine how a crash happened, or help them respond to an accident that has just occurred by sending out information like severity of the accident, the number of passengers, and the exact location of the collision using GPS.
Currently the problem is cost. Setting up central locations to receive the information and interpret it, and the components for the cars to communicate with these central locations won't be cheap.
Source: New York Times