Roads carrying strategic traffic and under the jurisdiction of the Highways Agency.
an 'A' road maintained by the Highways Agency
A road for which the Highways Agency is the highway authority. The A316 and the A205 are the only such roads in the borough. Trunk roads form part of the strategic network.
highway; parkway (in open landscape) Tube, the [colloq.] the London subway
A trunk road, trunk highway, or strategic road is a major road—usually connecting one or more cities, ports, airports, etc.—which is the recommended route for long-distance and freight traffic. Many trunk roads have segregated lanes, or are motorway standard.