NASHVILLE (AP) — The Tennessee Department of Transportation has launched live streaming of traffic conditions in the state's four largest cities on its web and mobile app.

The video on the TDOT SmartWay app will show video from cameras located in Memphis, Nashville, Knoxville and Chattanooga.

The free app also includes information on accidents, construction and road conditions. It can also pinpoint the location of mobile users.

Transportation Commissioner John Schroer says the app is a way to keep up with changing traffic conditions and to alert drivers to avoid congested areas or hazardous road conditions.

The department reminds motorists not to use the app while driving.