Tractor Lighting Law UK: Every Light a Tractor Needs on the Road

UK tractor lighting law is the Road Vehicles Lighting Regulations 1989. Every tractor used on the road at night needs 2 white front position lamps, 2 red rear lamps, 2 red rear reflectors and a number plate lamp. Tractors capable of over 15 mph add dipped headlamps and indicators; over 25 mph adds stop lamps and a rear fog lamp.

The rules depend on 3 facts about the machine: its maximum design speed, the date it was first used (1 April 1986 is the key date for agricultural vehicles) and whether it is being used between sunset and sunrise. This guide works through each lamp in the order the regulations list them, then covers beacons, daytime use, trailers, overhanging implements and what gets checked at the roadside. For what each type of lamp does and where it is fitted, see the complete guide to tractor lighting. This page is about the law.

Which regulations apply to tractor lights

The Road Vehicles Lighting Regulations 1989 (SI 1989/1796, as amended) are the regulations for tractor lighting in Great Britain. Regulation 18 and Schedule 1 list the obligatory lamps for each class of vehicle, and Schedules 2 to 24 set the number, position, colour and marking of each lamp. Regulations 23 to 27 control maintenance and use.

A tractor falls under Table I of Schedule 1 (motor vehicles with 3 or more wheels). The regulations define an “agricultural vehicle” as a vehicle constructed or adapted for agriculture, grass cutting, forestry, land levelling, dredging or similar work and primarily used for those purposes, and the definition includes any trailer drawn by an agricultural vehicle. Several exemptions in Table I apply only to agricultural vehicles, so that definition matters.

Two other sets of rules sit alongside the RVLR. The Road Vehicles (Construction and Use) Regulations 1986 and the Road Vehicles (Authorisation of Special Types) (General) Order 2003 cover projections, widths and marker boards. The Road Vehicles (Display of Registration Marks) Regulations 2001 cover number plates.

The 15 mph and 25 mph speed thresholds

The speed thresholds in Schedule 1 refer to the tractor’s maximum speed by construction, not the speed it is driven at. Two thresholds decide most of the requirements:

• 15 mph or less: no dipped-beam headlamps, no direction indicators and therefore no hazard warning device are required.
• 25 mph or less: no main-beam headlamps, stop lamps, rear fog lamp, side marker lamps, end-outline marker lamps, side retro reflectors or rear markings are required.

A tractor whose maximum speed by construction is 40 km/h (24.85 mph) sits in the “not exceeding 25 mph” bracket, provided it genuinely cannot go faster than 25 mph. A 50 km/h or 60 km/h tractor does not, and the full Table I list applies to it. Check the design speed on the manufacturer’s plate or in the handbook rather than guessing.

There is also a date exemption. An agricultural vehicle first used before 1 April 1986 does not need dipped or main-beam headlamps, direction indicators, hazard warning lamps, stop lamps or a rear fog lamp, whatever its speed. Older tractors that do have these lamps fitted should still keep them working, because any stop lamp or indicator that is fitted must be in good working order (regulation 23).

Every light your tractor needs, lamp by lamp

The table below summarises the obligatory and optional lamps for a tractor used on a public road. “Required” assumes the tractor is used between sunset and sunrise or in seriously reduced visibility, and was first used on or after 1 April 1986.

Lamp or device	Required on a tractor?	Colour	Number	Key notes
Front position lamps (sidelights)	Yes, all speeds	White	2	Within 400 mm of the side; max height 2,100 mm on tractors up to 25 mph
Dipped-beam headlamps	Yes if max speed over 15 mph	White or yellow	2 (matched pair)	No max height or side distance for agricultural vehicles; min height 500 mm
Main-beam headlamps	Yes if max speed over 25 mph	White or yellow	2 (matched pair)	Must dip or switch off with the dip switch; tell-tale required
Direction indicators	Yes if max speed over 15 mph	Amber	1 front and 1 rear each side	Side repeaters only needed over 25 mph; 60 to 120 flashes per minute
Hazard warning lamps	Yes where indicators are required	Amber	All indicators	Must also flash any trailer indicators
Rear position lamps (tail lights)	Yes, all speeds	Red	2	Within 400 mm of the side, at least 500 mm apart, 350 mm to 2,100 mm high
Stop lamps	Yes if max speed over 25 mph	Red	2	At least 400 mm apart; any fitted stop lamp must work
Rear fog lamp	Yes if max speed over 25 mph	Red	1 or 2	One lamp on the centre line or offside; 250 mm to 2,100 mm high; tell-tale
Rear retro reflectors	Yes, all speeds	Red	2	Not triangular on the tractor; 250 mm to 900 mm high (1,500 mm if impracticable)
Rear registration plate lamp	Yes where a rear plate is carried	White	As needed	Must light the plate adequately; approval mark on post-1986 tractors
Reversing lamps	Optional	White	Up to 2 (4 on vehicles over 6 m long)	Lit only when reversing
Side and end-outline marker lamps	Only over 25 mph (length over 6 m, width over 2.1 m)	Amber at the side; white front and red rear for end-outline	As the schedules require	Rarely needed on a standard tractor
Amber warning beacon	Yes on unrestricted dual carriageways if max speed 25 mph or less	Amber	At least 1, visible all round	Centre at least 1,200 mm high; 60 to 240 flashes per minute
Work lamps	Optional	White (normally)	Any	Only lit to light a working area, never while driving on the road

Front position lamps

Front position lamps are the 2 white sidelights that show the tractor’s width from the front. They are obligatory at every speed. On a tractor first used on or after 1 April 1986, the outer edge of each lamp must be within 400 mm of the side, and on a tractor with a maximum speed of 25 mph or less the lamps can be up to 2,100 mm above the ground. Wide front axles and dual wheels often push the edge of the tractor beyond that 400 mm line, which is why many tractors carry position lamps on the mudguards or on extension brackets.

Dipped-beam and main-beam headlamps

Dipped-beam headlamps are obligatory on a tractor capable of more than 15 mph and first used on or after 1 April 1986. Agricultural vehicles have no maximum mounting height and no maximum distance from the side for dipped beams, which allows the high cab-roof and bonnet headlamps seen on modern tractors. The lower edge must be at least 500 mm above the ground.

Main-beam headlamps are only obligatory above 25 mph, but almost every tractor has them. Whatever its speed class, any main-beam lamp must either dip or switch off when the driver selects dipped beam. Dipped beams must be lit at night on roads without street lights and in seriously reduced visibility, which the Highway Code describes as being unable to see more than 100 metres. Our tractor headlights range covers direct replacements and E-marked LED units.

Direction indicators and hazard warning lamps

A tractor capable of more than 15 mph and first used on or after 1 April 1986 needs 1 amber front indicator and 1 amber rear indicator on each side. Side repeaters are only required above 25 mph. Indicators must flash at 60 to 120 times a minute, and on tractors capable of 25 mph or less there is no maximum mounting height, which is why indicators are often mounted on the cab pillars. A hazard warning switch is needed on any tractor that must have indicators, and it must flash the trailer’s indicators as well.

Rear position lamps, stop lamps and rear reflectors

Every tractor needs 2 red rear position lamps and 2 red rear reflectors, whatever its age or speed. The lamps must be within 400 mm of the side, at least 500 mm apart and between 350 mm and 2,100 mm above the ground on an agricultural vehicle. Rear reflectors must not be triangular on a tractor, because triangular reflectors are reserved for trailers.

Stop lamps are obligatory only on tractors capable of more than 25 mph. In practice most tractors leave the factory with them, and regulation 23 says any stop lamp that is fitted must work.

Rear fog lamp

A rear fog lamp is obligatory only on a tractor capable of more than 25 mph and first used on or after 1 April 1986. One lamp is enough and it goes on the centre line or the offside. On an agricultural vehicle it can be mounted up to 2,100 mm high, at least 250 mm above the ground and at least 100 mm from any stop lamp. It must have a tell-tale and must not come on with the brakes. Like every rear fog lamp, it may only be used in seriously reduced visibility.

Number plate lamp

A tractor can display its registration plate on both sides or on the rear, or on the rear of the trailer it is towing. Where a plate is carried on the rear, it needs a white rear registration plate lamp that lights the plate adequately, with an approval mark on tractors first used on or after 1 April 1986. Our number plate lights include LED units for tractors and trailers.

Reversing lamps, side markers and end-outline markers

Reversing lamps are optional on a tractor. If fitted, there can be no more than 2 (4 on vehicles over 6 m long that are not passenger vehicles), they must show white light and they may only be lit while reversing. Rear work lamps are not reversing lamps, even when they are used for the same job.

Side marker lamps and end-outline marker lamps are exempt on any vehicle with a maximum speed of 25 mph or less. On a fast tractor they come in only where the length or width thresholds are met: over 6 m long for side markers and over 2,100 mm wide for end-outline markers.

Amber beacons under regulation 17

Regulation 17 makes an amber warning beacon compulsory on any motor vehicle with 4 or more wheels and a maximum speed of 25 mph or less when it is used on an unrestricted dual carriageway, meaning a dual carriageway where the speed limit is over 50 mph. The beacon can be on the tractor or on the trailer it is towing. Regulation 26 says the beacon must be kept lit on that road.

Schedule 16 sets 3 practical rules. The centre of the beacon must be at least 1,200 mm above the ground. The light from at least 1 beacon must be visible from any point at a reasonable distance from the tractor and any trailer, which can mean 2 beacons when a trailer or implement blocks the view. It must flash between 60 and 240 times a minute at a constant rate.

There are 2 exemptions: vehicles first used before 1 January 1947, and a vehicle that is only crossing the dual carriageway by the quickest practicable route. On other roads a beacon is not compulsory, but regulation 27 allows an amber beacon to be lit whenever it is necessary or desirable to warn others of the vehicle’s presence, and most operators run one on any public road. Only vehicles on the regulation 11 amber list may show an amber beacon at all: that list includes any vehicle with a maximum speed of 25 mph or less and its trailer, and any vehicle over 2.9 m wide including its load, so a 50 km/h or 60 km/h tractor is only on it if it qualifies another way, such as width. The full detail is in when amber beacons are legally required, and you can browse our amber tractor beacons.

Daytime use and when lamps must be lit

Tractor lights must be fitted and working at all times if the tractor has them, but they only have to be lit at certain times. Regulation 24 requires position lamps, the number plate lamp and any required marker lamps to be lit between sunset and sunrise and in seriously reduced visibility. Regulation 25 requires dipped beams in the hours of darkness on unlit roads and in seriously reduced visibility.

Regulation 23 requires every obligatory lamp to be clean and in good working order whenever the tractor is used on the road, including daylight. There is a daytime allowance: a lamp that fails during the journey, or one that you have already arranged to repair, is not an offence between sunrise and sunset.

Regulation 4(3) adds one more daylight rule. A vehicle not fitted with any front or rear position lamps does not need any lamps at all between sunrise and sunset. That is why some vintage tractors with no lighting can still be driven on the road in daylight. Once a tractor has position lamps fitted, the normal rules apply.

Trailers and implements

A trailer drawn by a tractor counts as an agricultural vehicle, so it gets the agricultural exemptions in Table VI of Schedule 1. The minimum is 2 red rear position lamps, 2 red triangular rear reflectors and a lit number plate. Indicators are required on trailers manufactured on or after 1 October 1990, front position lamps on trailers wider than 1,600 mm, and amber side reflectors on trailers longer than 5 m excluding the drawbar.

Stop lamps are not obligatory on a trailer drawn by an agricultural vehicle, but if the trailer hides the tractor’s stop lamps they should be repeated on the trailer, and every stop lamp that is fitted must work. The lamp-by-lamp rules are in our guide to agricultural trailer lighting requirements.

Mounted implements follow regulation 21. If a mounted implement or load hides any obligatory lamp or reflector, the lamp or reflector must be moved to the implement or duplicated on it. For stop lamps and indicators that rule applies at all times, including daylight. This is why a front-mounted mower, a large rear spreader or a bale handler often needs a lighting board.

Overhanging implements and marker boards

Implements and loads that stick out from the tractor bring their own lighting and marking rules. Under regulation 21, if a load or implement projects sideways more than 400 mm beyond the outer edge of the position lamp on that side, extra front or rear position lamps and reflectors are needed at night. If it projects more than 2 m forwards or rearwards on an agricultural vehicle, an extra lamp and reflector must be fitted within 2 m of the end of the projection.

Marker boards are covered by the Construction and Use Regulations and the special types rules for agricultural vehicles. The Special Types Order (article 23 and Schedule 8) gives these thresholds:

• Over 1 m: the projection must be made clearly visible from the end and both sides, and sharp edges guarded.
• Over 2 m: an end marker board is required.
• Over 3 m: end and side marker boards are required.
• Over 4 m: the police must be notified for each area the vehicle will travel through.
• Over 6 m: an attendant is required.

Marker boards must be lit at night by a lamp that makes them visible from a reasonable distance and is shielded so its light is not seen directly by other road users. For wide machines, a vehicle wider than 3 m must notify the police before any journey of over 5 miles or on a road with a speed limit of 40 mph or less, and one wider than 3.5 m needs an attendant.

Work lights and other optional lamps

Work lights are legal to fit to a tractor, but regulation 27 says a work lamp must not be lit except to light a working area, an accident, a breakdown or roadworks near the vehicle, and it must never cause undue dazzle. That rules out driving along the road with front or rear work lights on. Front fog lamps may only be used in seriously reduced visibility, and reversing lamps only while reversing.

Any optional lamp that is fitted must still meet the colour and position rules for its type. No lamp other than a side marker may show red to the front, and the only white light allowed to the rear comes from reversing lamps, work lamps, the number plate lamp and interior lighting.

What the police and DVSA check

Most tractors are exempt from roadworthiness testing, so tractor lighting is enforced at the roadside by the police and DVSA examiners rather than at an MOT. Government guidance notes that tractors capable of more than 40 km/h used for commercial haulage (not agricultural work) more than 15 miles from base do need roadworthiness tests, and that every tractor owner must keep the machine roadworthy.

A roadside check usually looks at 6 things:

1. Position lamps, number plate lamp and headlamps all working and clean.
2. Indicators and stop lamps working on both the tractor and the trailer, flashing in phase.
3. Rear reflectors present and the right type (triangular on the trailer only).
4. A beacon lit on an unrestricted dual carriageway if the tractor is a 25 mph machine.
5. No work lights on while driving and no rear fog lamp on in clear weather.
6. Projections marked, lit and within the notification limits.

A defect can lead to a warning, a defect rectification notice or a fixed penalty, and a dangerous defect can be dealt with more seriously. See lighting offences for agricultural vehicles for the enforcement detail.

Frequently asked questions

Does a tractor need lights to drive on the road in the day?

A tractor with no front or rear position lamps fitted does not need any lamps between sunrise and sunset under regulation 4(3) of the RVLR. If the tractor does have lamps fitted, the obligatory ones must be clean and working whenever it is on the road, although a lamp that fails during a daylight journey is not an offence if you get it repaired promptly.

Does a 40 km/h tractor need stop lamps?

Legally, no. A 40 km/h tractor has a maximum speed just under 25 mph, so stop lamps, main beam and a rear fog lamp are not obligatory. Almost all modern tractors have them fitted from new, and regulation 23 says any stop lamp or indicator that is fitted must be kept in good working order.

Is a beacon a legal requirement on a tractor?

An amber beacon is only compulsory when a tractor with a maximum speed of 25 mph or less is used on an unrestricted dual carriageway. It must be at least 1,200 mm high, visible all round the tractor and trailer, and kept lit. On other roads you may use it whenever it is necessary or desirable to warn other road users.

Can I use work lights on the road?

No. A work lamp may only be lit to light a working area, an accident, a breakdown or roadworks near the vehicle. Driving on a public road with front or rear work lights on is not allowed, and white rear-facing work lights in particular dazzle drivers behind. Switch them off at the field gate.

Who enforces tractor lighting law if tractors don’t have an MOT?

The police and DVSA examiners enforce it at the roadside. Most tractors are exempt from roadworthiness testing, so the owner and driver are responsible for checking the lights before each road journey.