(1) A "road" is—
(a) an area that is open to or used by the public and is developed for, or has as one of its main uses, the driving or riding of motor vehicles; or
(b) a place that is a road by virtue of a declaration under section 3(2)(a) of the Road Safety Act 1986 —
but does not include a place that is not a road by virtue of a declaration under section 3(2)(a) of the Road Safety Act 1986 .
Motor vehicle is defined in the Road Safety Act 1986 .
(2) However, a reference in these Rules (except in this Division) to a "road" does not include a reference to any shoulder of the road.
(3) The "shoulder "of the road means an area (not being part of the road) adjoining the road that is open to or used by the public for driving, riding or parking motor vehicles and to which a parking control sign does not apply.
Parking control sign is defined in the dictionary.