Ford says its work is currently proprietary but it will all fit into the broader public-private smart vehicle program known as the Crash Avoidance Metrics Partnership (CAMP). Similarly, General Motors uses V2V signaling to do a sophisticated form of blind spot detection. Others with smart car and V2V technologies include Daimler and Honda. In Ford's smart intersection system, equipped vehicles ge a digital map of the intersection, six additional maps of surrounding stop sign intersections and crosswalks, lane-specific GPS location, and well as traffic light status and timing information. The car's collision avoidance system may (may not will, Ford cautiousy says) be able to determine whether the car can get safey through the intersection on green/yellow, or if it needs to stop - and if it doesn't look as if the driver is planning to stop, then it sends a signal to other vehicles nearby.

The government estimates 40% of crashes and 20% of fatalities are at intersections. Some other fixes, such as red light cameras, may reduce the number of serious accidents (right-angle crashes) while increasing others when cars stop suddenly to avoid the possibility of a "safety camera" ticket.

Infrastructure-to-vehicle communications could directly ease congestion by reducing crashes. According to the Texas Transportation Institute's 2007 Urban Mobility Report, traffic congestion wastes fuel - 3 billion gallons in 2000, or 10 gallons per person in the U.S. The same sensors could be part of a real time traffic information system that would suggest alternate routes.