Drivers of commercial vehicles may be subject to bans that do not apply to other vehicles. These bans may apply to particular vehicle classes or to larger vehicles. Regulatory traffic signs mark the beginning of the ban. If the ban applies to your vehicle then you must not drive past the sign or drive on the road to which it applies.

Supplementary plates may give additional information or exemptions to the ban.

Commercial vehicles may also be subject to stopping bans or restricted to specific parking places. (See pages 80, 81 and 82.)

Medium and heavy goods vehicles, buses, and other special purpose vehicles are prohibited from using the offside lane of an expressway where there are three or more lanes open for use, unless it is necessary to do so in order to reach an offside exit.

An 'Except for access' plate allows a vehicle to pass to gain access to premises and land adjacent to the road, or roads, to which the ban applies, where there is no alternative route.	Width limit to vehicles over width shown
A 'Time plate' will indicate the time periods during which the ban applies.	Length limit - no vehicles, or combination of vehicles, over length shown
	Height limit - no vehicles, including any load, over height shown
Weight limit - no vehicles over permitted gross vehicle weight shown	No buses or coaches
Axle weight limit - no vehicles over permitted gross axle weight shown	No minibuses (public light buses)
No goods vehicles over permitted gross vehicle weight shown	No goods vehicles

Restricted headroom

A bridge or other structure over a road may restrict the actual headroom available. The restriction may be temporary due to bridge or other construction works. A warning sign will indicate the maximum headroom and that part of the road where the indicated headroom is available.

Advanced warning of restricted headroom may be given by a 'Restricted headroom ahead' warning sign with a supplementary plate showing the distance to the restriction. Alternatively the warning sign may be shown on an advance direction sign.