The U.S. Department of Transportation (DOT) is creating a real-world information monitoring system for the national road network. Vehicle infrastructure integration (VII) applies the most modern technology possible to respond to and prevent accidents, save lives, and improve transportation efficiency. As much as 5.7 billion gallons of fuel are wasted, along with 3.5 billion work hours, due to traffic congestion each year. This costs $69.5 billion annually, plus the $230 billion to respond to and manage traffic accidents. Almost every state DOT and automobile manufacturer is participating in the effort to use wireless communications to monitor mobility, safety, and commercial data. The VII initiative's goal is linking all cars, trucks, and public transit vehicles to each other and processing centers. Sensors, processors, communication devices, and wireless technology to connect them are needed to establish VII. This system would have security monitoring potential, such as tracking commercial vehicles and cargoes or monitoring private vehicles and public transportation. Probe cars will need equipping with detailed digitized road maps that give vehicles precise locations at all times. Infrastructure managers will also need digital maps to show where vehicles are. The VII project would be the largest application of technology to the U.S. road network to date and will enhance the mobility so urgently sought in the twenty-first century.