EE WAS OPERATING A LOADED HAUL TRUCK ON A FLAT SURFACE, STRAIGHT ROADWAY. THE EE ATTEMPTED TO MAKE A LEFT HAND TURN AT A HIGH RATE OF SPEED. WHEN THE HAUL TRUCK STARTED TO TURN IT BEGAN TO SLI DE SIDEWAYS AND ROLLED OVER ON ITS RIGHT SIDE CAUSING THE EE TO SUFFER A BROKEN COLLARBONE.