Road, specially designed and built for motor traffic, which does not serve properties bordering on it, and which:
(a) is provided, except at special points or temporarily, with separate carriageways for the two directions of traffic, separated from each other, either by a dividing strip not intended for traffic, or exceptionally by other means;
(b) does not cross at level with any road, railway or tramway track, or footpath;
(c) is specially sign-posted as a motorway and is reserved for specific categories of road motor vehicles.
Entry and exit lanes of motorways are included irrespectively of the location of the sign-posts. Urban motorways are also included.