The recommended width for through lanes shared by cars, two-wheeled motorized vehicles, and occasional fullsize transit vehicles is 3 m. This width serves all of these vehicles while discouraging high speeds. Lanes that are 2.7 m wide may be used in streets with speeds of 30 km/h or lower.
Large Vehicles Lanes
Through lanes of mixed traffic shared with trucks and buses may be 3–3.3 m wide. Curbside travel lanes may also be 3.3 m wide. Remnant width should not be added to the lane.
Bidirectional Travel Lane
The recommended width for bidirectional lanes, also known as yield lanes, is 4.75–5.5 m. On low-volume streets without transit routes, vehicles moving in opposite directions can yield to one another as they pass.
The recommended width for turn lanes or pockets is 3 m or narrower if truck volumes are low. If wider turn radii are needed, channelization, recessed stop bars, or curb extensions are preferable to wide curbside turn lanes. Where larger effective turn radii are needed, such as where transit vehicles or trucks turn, a recessed stop bar may be used on the receiving side. See: Design Vehicle and Control Vehicle.