Road Traffic (Light Vehicle Standards) Rules 2018
Div 3Headlights
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Division 3—Headlights 73—Headlights to be fitted to vehicles (1) A motor vehicle must be fitted with— (a) 1 low‑beam headlight if it is a moped, motor bike, or motor trike with 1 front wheel; or (b) a pair of low‑beam headlights if it has 4 or more wheels or is a motor trike, except a moped, with 2 front wheels. (2) If a motor vehicle built after 1934 can travel at over 60 kilometres an hour— (a) each low‑beam headlight mentioned in subrule (1) must be able to work in the high‑beam position; or (b) the vehicle must be fitted with— (i) 1 headlight that can work in the high‑beam position if the vehicle is required to have 1 low‑beam headlight; or (ii) a pair of headlights that can work in the high‑beam position. (3) A motor bike may be equipped with a headlight modulation system that— (a) varies the brightness of its high‑beam headlight or low‑beam headlight, but not both, at a rate of at least 200 and at most 280 flashes a minute; and (b) is designed to operate only in the daylight. (4) Up to 4 additional headlights may be fitted to a motor vehicle with 4 or more wheels, a motor bike or a motor trike. (5) An additional headlight fitted to a vehicle must be fitted so that it faces forward and is symmetrical in relation to the centre‑line of the vehicle.
74—How headlights are to be fitted (1) The centres of low‑beam headlights fitted as a pair on a motor vehicle with 4 or more wheels must be at least 600 millimetres apart. (2) However, subrule (1) does not apply to a motor vehicle built before 1970 if the centres of its low-beam headlights— (a) were under 600 millimetres apart when the vehicle was built; and (b) are not nearer than they were when the vehicle was built. (3) Each low‑beam headlight of a pair on a motor trike (except a moped) with 2 front wheels must not be over 400 millimetres from the nearer side of the vehicle. (4) The centre of a low‑beam headlight fitted to a motor vehicle built after June 1953 must be— (a) at least 500 millimetres above ground level; and (b) not over 1.4 metres above ground level. 75—How single headlights are to be fitted (1) A motor bike or motor trike with a single headlight fitted must have the light fitted in the centre. 77—Performance of headlights (1) When on, a headlight, or additional headlight, fitted to a vehicle must— (a) show only white light; and (b) project its main beam of light ahead of the vehicle. (2) Headlights must be fitted to a vehicle so their light does not reflect off the vehicle into the driver's eyes. 78—Effective range of headlights (1) This rule applies to a headlight that is on at night. (2) A low‑beam headlight must illuminate the road ahead of the vehicle for at least 25 metres. (3) A high‑beam headlight must illuminate the road ahead of the vehicle for at least 50 metres. (4) However, a low‑beam headlight fitted to a motor vehicle built before 1931, or a moped, need only illuminate the road ahead of the vehicle for 12 metres. 79—Changing headlights from high-beam to low-beam position (1) A motor vehicle built after 1934 that can travel at over 60 kilometres an hour must be fitted with— (a) a dipping device enabling the driver in the normal driving position— (i) to change the headlights from the high‑beam position to the low-beam position; or (ii) simultaneously to switch off a high‑beam headlight and switch on a low‑beam headlight; and (b) for a vehicle built after June 1953—a device to indicate to the driver that the headlights are in the high‑beam position. (2) A headlight fitted to a vehicle not fitted with a dipping device mentioned in subrule (1)(a) must operate in the low‑beam position. (3) When a headlight fitted to a vehicle is switched to the low‑beam position, any other headlight on the vehicle must operate only in the low‑beam position or be off.