57.—(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 Secretary of State 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 Secretary of State in accordance with direction 58; or
(b)it is of a type approved by the Secretary of State 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 Secretary of State in accordance with direction 58.
(4) In paragraph (5) “the European Standards” means European Standards EN 1463–1: 1997 and 1463–2: 2000 for retroreflecting road studs.
(5) A type of stud meets the requirements of this paragraph if and only if, being a type of stud which falls within a description specified in column (2) of an item in the table, it meets the performance requirement or test specification of the European Standards specified in column (3) of the item as it applies to studs within the class specified in that column.
| (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 European 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
|
| 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 |