Witnesses told Chattanooga Police a truck on Alton Park Boulevard suddenly veered off the roadway and into a vacant lot.
Driver William Grant appeared to be slumped over the steeling wheel.
The truck then hit an SUV on West 38th Street.
Grant was taken to the hospital and pronounced dead.
The people in the SUV had minor injuries.
It’s unclear right now if the crash killed Grant or if he suffered a medical problem.