Where a road authority, within the meaning of section 2 of the Roads Act, 1993, constructs or alters, or consents to the construction or alteration of, any public footway or other public pavement, it shall, for the purpose of facilitating the mobility of persons with a disability, provide, or require the provision of, ramps, dished kerbs or other sloped areas at appropriate places at or in the vicinity of any pedestrian crossing or intersection used by pedestrians in that part of the footway or pavement so constructed or altered.