Abstract: An assembly is provided for excavating cavities in a road surface for a variety of purposes, among them, the formation of rumble strips, the installation of light reflective road markers, the milling of potholes, boring of holes for various purposes and the like. The system is used in combination with a vehicle having a motor powered vertically movable rear lift gate which in use defines a vertically displaceable substantially horizontal platform. A cutting apparatus is secured to the upward facing surface of the lift gate with the actual cutting portion being mounted on a rotatable drive shaft extending laterally of the gate, such that the cutting portion projects at least partially below the bottom surface of the lift gate, whereby with the gate in a lowered position, the cutting portion can engage the surface of the road on which the vehicle resides. A motor is secured to the upper surface of the gate powers the drive shaft.