A dynamic roll over control system generates ground speed signals indicative of a current speed and compares the current speed to a desired speed. The desired speed is determined based upon the machine characteristics, the payload of the bed, the yaw rate of the bed, the pitch rate of the bed, and the roll angle of the bed. When the current speed of the machine exceeds the desired speed, the controller generates prime mover control signals to control operation of the prime mover to slow the machine so the current speed does not exceed the desired speed.