Abstract: A method and apparatus for controlling engine rpm and thus the real time ground speed or real time implement operating speed, each hereinafter referred to as “real time operational speed”, of industrial and off highway vehicles thru the use of an electronic control module (ECM) and sensory means including speed sensors, which sensors transmit electrical, mechanical, electro-mechanical or other signals to the (ECM) of said real time operational speeds of the vehicle to control via the (ECM), the vehicle ground speed in accordance with pre-set safety or other operational requirements programmed into the (ECM).