Municipal roads, subdivision and site servicing work, and rural road shoulders where an OPSD detail is called up on the drawings.
Private roads, campus and institutional drives, and internal circulation roads that a road authority never inspects but that an owner still wants built to the public standard.
Industrial yards, truck courts, and loading areas where trailers, yard trucks, and heavy equipment need to be kept off tanks, transformers, racking lines, dust collectors, and building corners.
Parking facilities, including deck edges, ramp curves, and the transition from asphalt lot to structure, where guide rail is doing the work a low curb cannot.
Quarries, transfer stations, waste and aggregate sites, and any yard with steep edges, retaining walls, or ponds along a haul route.
Solar, substation, and utility sites where access roads run past equipment that cannot take a hit.