The Tennessee Department of Transportation has about 475 SmartWay cameras operating in Memphis, Nashville, Chattanooga and Knoxville as of 2015, according to the agency. The video surveillance cameras track highway congestion and enable the department to manage delay-causing events more effectively.
The SmartWay system includes approximately 49 video detection systems and more than 1,000 roadway detection devices, all of which help to calculate highway travel times based on traffic count and flow, notes the Tennessee Department of Transportation. A website offers camera views and pertinent travel information as part of the state's transportation management system. More than 160 message signs and a voice-activated phone service inform motorists throughout the state about construction, traffic and weather conditions.