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Title: Carriageway  
Author: World Heritage Encyclopedia
Language: English
Subject: Circumferential Road 5, Federal Highway (Australia), Street, Road verge, Dead Man's Curve
Collection: Road Infrastructure
Publisher: World Heritage Encyclopedia


Diagram showing different arrangements of the elements of a road

A carriageway[1] (North American English: roadway[2]) consists of a width of road on which a vehicle is not restricted by any physical barriers or separation to move laterally. A carriageway generally consists of a number of traffic lanes together with any associated shoulder, but may be a sole lane in width (for example, a highway offramp).

A Fort Lee. High-occupancy vehicle lanes may also be physically separated from the remainder of the general traffic lanes as a distinct roadway. Some cities such as Pittsburgh, Pennsylvania, have many bus-only roadways to alleviate congestion related to public transit buses, despite its very challenging topography which severely limits the extent to which arterial roadways can be added or augmented.

See also


  1. ^ "Multi-lane carriageways (133-143)". Highway Code. A dual carriageway is a road which has a central reservation to separate the carriageways. 
  2. ^ "Railroad-Highway Grade Crossing Handbook - Revised Second Edition August 2007 - Glossary". Federal Highway Administration. The portion of a highway, including shoulders, for vehicular use. A divided highway has two or more roadways. 
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