Explanatory note

These Regulations apply to the M25 between junctions 10 and 15 and to parts of the adjoining slip roads.

The main effect of the Regulations is that if a vehicle passes a speed limit sign on a road to which the Regulations apply, the vehicle must not be driven at a speed above that indicated by the sign until it passes a sign indicating that the restriction ceases to apply or it ceases to be on any such road. This will enable variable speed limit signs to be introduced.

The Regulations contain a provision which enables a driver of a vehicle to ignore changes to traffic signs that occur at any location less that 10 seconds before the vehicle passes that location (see regulation 4(4) to (6)).