society > travel > means of travel > route or way > way, path, or track > road > [verb (transitive)] > convert to specific type of road (5)
transitive. To deprive of the legal status of being a main road.
transitive. To convert (a road) into a main road.
To make (a minor road) into a trunk road; to upgrade and reclassify as a trunk road.
transitive. To convert (a road) into a dual carriageway.