A dump truck carrying a load of rock narrowly avoided tragedy when the driver’s brakes failed on Williamson Circle in DeKalb County.According to investigating Tennessee Highway Patrol Trooper Jeremy Tramel, driver Lawrence Buchanan, 53, of Murfreesboro was operating a 1997 Ford dump truck traveling north on Williamson Circle. The truck was traveling down an incline and the brakes failed. Buchanan attempted to steer the vehicle up a driveway when it struck a ditch on the right side of the roadway and overturned onto the driver’s side.