関連ワード:  is a highway a dual carriageway    is a road a dual carriageway    is a trunk road a dual carriageway    is a ring road a dual carriageway    is a motorway a dual carriageway    is a 3 lane road a dual carriageway    is a b road a dual carriageway    is an expressway a dual carriageway    is finchley road a dual carriageway    is an a road a dual carriage way