Abstract: A pavement cutting method and apparatus for cutting a concrete or asphalt pavement utilizes one or more cutter-mounting frames having one or more cutter assemblies mounted thereon for making a cut in a pavement. The leading end of each frame has a coupling for pivotally mounting the leading end of the frame to a towing vehicle for towing the frame so that the frame pivots about a vertical or substantially vertical pivot-axis passing through the coupling. Each of the one or more cutter assemblies has a driven rotary saw blade that is located in a common vertical or substantially vertical plane that contains the vertical or substantially vertical pivot-axis of the coupling whereby the saw blade of each of the one or more cutter assemblies follows the pivot-axis of the coupling when the frame is being towed in the cutting direction of travel for the pavement cutting apparatus.

Abstract: A tactile warning surface structure having underfoot detectability is formed in place by a method wherein the shank portions of a plurality pins are inserted into and bonded to a plurality of holes formed in an upper surface of a concrete slab of a walkway. The holes are located within a defined area of the upper surface of the concrete slab and are spaced from each other in a predetermined pattern so that, when the shank portions of the pins are inserted into and bonded to the holes in the concrete slab with the upper end head portions of the pins projecting upward beyond the upper surface of the concrete slab at least a minimum distance, the pins in the defined area of the upper surface of the concrete slab form a tactile warning surface having underfoot detectability.

Abstract: A pressure washer sprays a pressurized liquid into a groove of a pavement, floor or similar surface to remove dirt and debris from the groove. The dirt and debris dissolves and/or becomes suspended in the liquid and is then removed from the pressure washer for disposal. The pressure washer includes a cleaning hood with a cover plate and a skirt that extends downward from the periphery of the cover plate to form a less than air tight seal with the surface containing the groove. A spray nozzle in a forward portion of the cover plate directs the pressurized liquid spray downward into the groove, where the liquid picks up dirt and debris to form a liquid suspension and/or solution, and preferably, rearward toward an exhaust port which removes the liquid suspension and/or solution of dirt and debris from the cleaning hood. A handle extends upward from the cleaning hood for guiding the pressure washer.