The Traffic Signs Regulations and General Directions 2016

Studs that provide illumination

7.—(1) A stud provided for in the Regulations that incorporates reflectors, retroreflecting material, a light source or any combination may only be placed if it complies with this general direction.

(2) If it incorporates reflectors or retroreflecting material, but no light source, a stud complies with this general direction if it is of a type which meets the applicable requirements and test specifications of the British Standard for retroreflecting studs.

(3) The applicable requirements and test specifications of the British Standard for retroreflecting studs for a type of stud of a description in column 2 of an item in the table are those shown in column 3.

(1) Item	(2) Description of stud	(3) British Standard requirement or test specification and class
1	Non depressible road stud	Dimensions : height-class H1 or H2
2	Depressible road stud	Dimensions : height-class H1, H2 or H3
3	Permanent road stud	Dimensions : maximum horizontal dimension exposed to traffic: HD1
4	Temporary road stud	Dimensions : minimum horizontal dimension exposed to traffic: HDT1
5	Permanent road stud	Night-time visibility : photometric requirements - class PRP1
6	Temporary road stud	Night-time visibility : photometric requirements - class PRT1
7	Temporary road stud	Daytime visibility : colour of body of stud class DCR1 fluorescent green-yellow class DV1
8	Any stud	Colorimetric requirements-class NCR1 for white, amber, red or green retroreflectors only
9	Any stud	Primary assessment-class S1
10	Any stud	Night-time visibility assessment-class R1, R2 or R3

(4) The appropriate national authority may approve the placing of a type of stud on a road for the purpose of testing whether that type complies with the applicable requirements and test specifications of the British Standard for retroreflecting studs mentioned in paragraph (3).

(5) A stud which incorporates a light source (whether or not it also incorporates reflectors or retroreflecting material) complies with this general direction if it is of a type which has been approved for use on roads by the appropriate national authority.

(6) Approval under paragraph (4) or (5) must be given by a notice in writing to the supplier of the stud.

(7) The notice may provide that approval is for a specified time period only.

(8) A time period may be varied by a subsequent notice and a subsequent notice may provide for a time period where one has not previously been given.

(9) All studs ceasing to be of an approved type by reason of the expiry of a time period must be removed before the expiry of that period.

(10) In this general direction “national authority”—

(a) in relation to roads in England and Wales, means the Secretary of State; and

(b) in relation to roads in Scotland, means the Scottish Ministers.

(11) An approval having effect immediately before the coming into force of these Regulations that applies in relation to roads in Scotland is to be treated as having been given by the Scottish Ministers in relation to those roads.