The Colorado Department of Transportation (CDOT) in the US has installed 75 solar-powered, Doppler radar sensors on 150 miles of key interstates and highways across the Denver metropolitan area.

The sensors, located nearly every mile on the roads and mounted on light or signage poles, collect continuous traffic speed information and send it to the SpeedInfo traffic data server via the AT&T Wireless data network.

The sensors will then provide real-time traffic information that can be accessed by the travellers on the department’s traveller information website.

The drivers can use the information to decide alternative routes that can help reduce congestion on key routes and around construction zones as well as to improve safety.