# The Traffic Signs Regulations and General Directions 2002, Regulation 57: Studs

Extent: E+W+S

(1) A stud incorporating reflectors or retroreflecting material, but no steady or intermittent light source, may be placed on a road if and only if—
(a) it is a stud of a type which meets the requirements of paragraph (5); or
(b) it is of a type approved by the national authority in accordance with direction 58.
(2) A stud incorporating both reflectors or retroreflecting material and a steady or intermittent light source, may be placed on a road if and only if—
(a) so far as it incorporates reflectors or retroreflecting material it is of a type that meets the requirements of paragraph (5) and, so far as it incorporates a steady or intermittent light source, it is of a type approved by the national authority in accordance with direction 58; or
(b) it is of a type approved by the national authority in accordance with direction 58.
(3) A stud incorporating a steady or intermittent light source and no reflectors or retroreflecting material may be placed on a road if and only if it is of a type approved by the national authority in accordance with direction 58.
(4) In paragraph (5) “the British Standards” means British Standards BS EN 1463-1:1998 Incorporating Amendment No. 1 and BS EN 1463-2:2000 for retroreflecting road studs.
(5) Table
(1)
(2)
(3)
Item
Description of stud
Requirement or test specification and class
NOTE: Expressions used in the table bear the same meanings as in the British Standards.
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

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Source: https://www.legislation.gov.uk/uksi/2002/3113/part/II/regulation/57 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2002/part-II/regulation-57
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.