The M4 Motorway (West of Junction 23A (Magor) to East of Junction 29 (Castleton)) (Variable Speed Limits) Regulations 2011

3.—(1) No person shall drive a vehicle on a section of a road which is subject to a variable speed limit at a speed exceeding that indicated by a speed limit sign.

(2) A section of road is subject to a variable speed limit in relation to a vehicle being driven on it if—

(a) the road is specified in the Schedule;

(b) the vehicle has passed a speed limit sign; and

(c) the vehicle has not passed—

(i) another speed limit sign indicating a different speed limit; or

(ii) a traffic sign which indicates that the national speed limit is in force.

(3) In relation to a vehicle, the speed limit indicated by a speed limit sign is the speed shown at the time the vehicle passes the sign, or, if higher, the speed limit shown by the sign ten seconds before the vehicle passed the sign.

(4) For the purpose of this regulation a speed limit sign is to be taken as not indicating any speed limit if, ten seconds before the vehicle passed it, the sign had indicated no speed limit or that the national speed limit was in force.

(5) In this regulation—

• “national speed limit” (“terfyn cyflymder cenedlaethol”) has the meaning given by regulation 5(2) of the 2002 Regulations and a traffic sign which indicates that the national speed limit is in force means a traffic sign of the type shown in diagram 671 in Schedule 2 to the 2002 Regulations which is—

  (a)

  placed on or near a road; and

  (b)

  directed at traffic on the carriageway on which the vehicle is being driven;

• “road” (“ffordd”) includes the adjacent hard shoulder and verge;

• “speed limit sign” (“arwydd terfyn cyflymder”), in relation to a vehicle, means a traffic sign of the type shown in diagram 670 in Schedule 2 to the 2002 Regulations which is—

  (a)

  placed on or near any part of a road specified in the Schedule; and

  (b)

  directed at traffic on the carriageway on which the vehicle is being driven.