be omitted and other mechanisms known in the art for attaching towed units to towing vehicles would be used the surface preparation apparatus 10 also includes a remote control and monitor unit 24 which enable a person in the cab of a tow vehicle to control the surface preparation apparatus 10 the remote control and monitor unit 24 is electrically connected to the various actuators of the surface preparation apparatus 10 by electrical wiring within cable 26 the surface treatment unit 22 of the preferred embodiment includes a housing 28 with an upper section 42 and a lower section 44 the preferred surface modifier is a cutter drum 82 contained within the lower section 44 of housing 28 the cutter drum 82 includes a plurality of cutter teeth 84 conventional to the art although the preferred surface modifier is a cutter drum as depicted in the fig3 11 it is understood that other surface modifiers known to the art may be utilized without departing from the spirit and scope of the invention the cutter drum 82 is rotatably connected to a conventional power source or motor not shown which is contained within the upper section 42 of housing 28 in preferred embodiments the power source is a standard caterpillar u00ae 3056 engine which is a turbo changed after cooled inline 6 cylinder diesel 180 hp engine the preferred clutch in an sae 3 rockford or equal engine mounted in other embodiments having greater horse power either 260 hp caterpillar u00ae 3126 engine can be used with a sae 1 clutch or.