roadbed

English Thesaurus

1. a bed supporting a road (noun.artifact)

hypernym	:	bed,
definition	:	a foundation of earth or rock supporting a road or railroad track (noun.artifact)

part holonym	:	safety island, safety isle, safety zone, traffic island,
definition	:	a curbed area in a roadway from which traffic is excluded; provides safe area for pedestrians (noun.artifact)

part meronym	:	road, route,
definition	:	an open way (generally public) for travel or transportation (noun.artifact)