Traffic is backed up to Ooltewah in this TDOT photo from the Times Free Press traffic map.
Traffic on Interstate 75 northbound has been brought to a standstill by a crash that happened about 2:40 p.m, dispatchers said.
The crash is at mile marker 18, near Cleveland, Tenn.
Wreckers are at the scene, according to the Tennessee Highway Patrol. The THP and the Bradley County Sheriff's Office dispatch had conflicting information about whether one vehicle or several were involved and whether there are any injuries.
Stay with the Times Free Press for more information as it develops.