Definition: Motorway / freeway
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 traffic in two directions, separated from each other, either by a dividing strip not intended for traffic, or exceptionally by other means
b) Has no crossings at the same level with any road, railway or tramway track, or footpath;
c) is especially sign-posted as a motorway and is reserved for specific categories of road motor vehicles.
International Transport Forum, Eurostat, United Nations Economic Commission for Europe (UNECE), "Illustrated Glossary for Transport Statistics", 4th Edition, Luxembourg 2009