The ambulance ran into the back of Tennessee Department of Transportation truck, killing the ambulance driver and patient. An off-duty firefighter tending to the patient was seriously injured. The truck driver suffered minor injuries.
Police were investigating why the ambulance was in the emergency lane. The highway work truck was painted fluorescent green and equipped with multiple flashing lights, though it wasn't known if they were on.
The ambulance was operated by Rural/Metro, a private company that serves Middle Tennessee counties.