The Oklahoma Highway Patrol is on the scene of a fatal crash on Highway 412 and the Keystone Lake Bridge.
Troopers say freezing temperatures, fog and icy conditions have made bridges and overpasses slick, and they are responding to several other crashes in the same area.
OHP says road crews are working to spread materials on elevated structures, but are asking drivers to be very careful.
Travelers can obtain current road and weather conditions by calling the DPS Road and Weather hotline at 888-425-2385. Motorists may also checkout specific areas of the state by visiting the Oklahoma Department of Public Safety's website at www.dps.state.ok.us