one of the two sides of a motorway where traffic travels in one direction only, usually in two or three lanes.

The part of the roading corridor devoted particularly to the use of travelling vehicles.legally this is called the roadway)

That part of the road constructed for use by vehicular traffic

The portion of road used by vehicles. Includes the shoulders and auxiliary lanes.

A route for vehicles of all descriptions. Public carriageway is the highest of the three statuses of Rights of Way. Horse-riders and walkers may also use (almost) all carriageways.

A way comprised in a highway, being a way (other than a cycle track) over which the public have a right for the passage of vehicles. [HA80 s329

A carriageway is a part of a road referring to the part that will technically carry the traffic.