The Colorado Department of Transportation (CDOT) is responsible
for a 9134-mile highway system throughout the state, including
3406 bridges. Each year, this system of highways handles more
than 48 billion vehicle miles of travel. CDOT maintenance forces
take care of the highway system, plowing snow and repairing
pavement. In fact, during the winter of 2009-2010, CDOT
personnel plowed 7.2 million miles of highway. They also used
more than 248,000 tons of asphalt and 178,800 gallons of liquid
asphalt to repair road damage and potholes. Information about
road conditions often comes to CDOT from its own workers or the
Colorado State Patrol. But for the past several years, the
agency has been deploying video surveillance systems to reduce
costs and provide real-time driver information on highways such
as Interstate 25 in Pueblo, Colorado Springs, and metro Denver,
Interstate 70 from Glenwood Canyon to metro Denver, Interstate
225 in metro Denver, and U.S. highways 6 and 85. In 2006, CDOT
wanted to extend this syst