Road Traffic (Light Vehicle Standards) Rules 2018
Div 9Side marker lights
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Division 9—Side marker lights 90—Vehicles needing side marker lights (1) A pair of side marker lights must be fitted towards the rear of the sides of a motor vehicle that is over 7.5 metres long and at least 2.2 metres wide. (2) A pole‑type trailer, and a motor vehicle built to tow a pole‑type trailer, with at least 1 cross‑bar or bolster must have a side marker light fitted to each side of the back or only cross‑bar or bolster. (3) A pole‑type trailer with 2 or more cross‑bars or bolsters may also have a side marker light fitted to each side of the front cross‑bar or bolster. (4) At least 2 side marker lights must be fitted to each side of— (a) a trailer, except a pole‑type trailer, that is at least 2.2 metres wide and not over 7.5 metres long; or (b) a semi‑trailer that is not over 7.5 metres long. (5) At least 3 side marker lights must be fitted to each side of— (a) a trailer, except a pole‑type trailer, that is at least 2.2 metres wide and over 7.5 metres long; or (b) a semi‑trailer that is over 7.5 metres long. 91—Location of side marker lights (1) The centre of a side marker light must not be over 150 millimetres from the nearer side of the vehicle. (2) A front side marker light fitted to a motor vehicle must be towards the front of the side of the vehicle with no part of the lens visible to the driver. (3) The centre of a front side marker light fitted to a trailer must be— (a) within 300 millimetres of the front of the side of the trailer; or (b) if the construction of the trailer makes it impracticable to comply with paragraph (a)—as near as practicable to the front of the trailer. (4) The centre of a rear side marker light fitted to a vehicle must be— (a) within 300 millimetres of the rear of the side of the vehicle; or (b) if the construction of the vehicle makes it impracticable to comply with paragraph (a)—as near as practicable to the rear of the vehicle. (5) Side marker lights fitted to a vehicle must, as far as practicable, be evenly spaced along the side of the vehicle. (6) Subrules (2) to (5) do not apply to side marker lights fitted to a cross‑bar or bolster of a pole‑type trailer. (7) Only the side marker lights nearest to the rear need be fitted if complying with subrules (3) and (4) would result in the front and rear side marker lights being under 2.5 metres apart. (8) A side marker light fitted to a vehicle must be fitted so— (a) its centre is not over— (i) 1.5 metres above ground level; or (ii) if it is not practicable to fit it lower—2.1 metres above ground level; and (b) its centre is at least 600 millimetres above ground level; and (c) it is, as far as practicable, in a row of side marker lights along the side of the vehicle. (9) Subrule (8)(a) does not apply to a side marker light that is not required to be fitted to the vehicle by rule 90. 92—Performance of side marker lights (1) When on, a side marker light fitted to a vehicle must— (a) show a light visible 200 metres from the vehicle; and (2) When on, a side marker light fitted to a vehicle must show— (a) to the front of the vehicle—a yellow light; and (b) to the rear of the vehicle— (i) if the light also operates as a rear light or reflector—a red light; and (ii) in any other case—a red or yellow light. (3) However, if a pole‑type trailer with 2 or more cross‑bars or bolsters has the side marker lights permitted by rule 90(3)— (a) the side marker lights fitted to the front cross‑bar or bolster may comply with subrule (2)(a) only; and (b) the side marker lights fitted to the back cross‑bar or bolster may comply with subrule (2)(b) only. 93—Side marker lights and rear clearance lights The side marker light nearest to the rear of a vehicle may also be a rear clearance light for rule 89.