Signals and signs
Traffic officers and Rule 108 — the signals you MUST obey
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An amber-lit 4x4 comes up behind you on the motorway, indicates left and points you onto the hard shoulder. It is not a police car and the driver is not a constable — and it makes no difference at all to what you have to do next. The Highway Code puts a traffic officer’s signal in the same MUST as a police officer’s, the Traffic Management Act 2004 put the offence behind it, and failing to stop is worth a four-figure fine and three points. Here is the rule the theory test actually asks about, and the powers that sit underneath it.
Rule 108 in full
Traffic officers have powers to stop vehicles on most motorways and some ‘A’ class roads, in England and Wales. If traffic officers in uniform want to stop your vehicle on safety grounds (e.g. an insecure load) they will, where possible, attract your attention by flashing amber lights, usually from behind; directing you to pull over to the side by pointing and/or using the left indicator. You MUST then pull over and stop as soon as it is safe to do so. Then switch off your engine. It is an offence not to comply with their directions.
Five things are packed into that paragraph, and each of them is a question waiting to be asked.
- Where. Most motorways and some A-class roads, England and Wales only. Not every road, and not Scotland or Northern Ireland.
- In uniform. The power exists only when the officer is wearing one — that is a statutory condition, not a courtesy.
- Amber lights, from behind. Blue means police. Amber means a traffic officer or a DVSA officer.
- The instruction itself. Pull over and stop as soon as it is safe, then switch off the engine. Not “slow down and see what they want”.
- MUST, in capitals. A legal requirement with an offence attached, which is a different animal from advice. Our guide to MUST vs should explains why the capitals decide everything.
Rule 105, three rules earlier, is the one that groups them all together: you MUST obey signals given by police officers, traffic officers, traffic wardens and signs used by school crossing patrols. There is no hierarchy inside that list. A traffic officer beckoning you across a closed lane carries exactly the authority a constable’s arm does.
Who is allowed to stop you, and how you tell them apart
| Who | How they signal you to stop | Rule | Where |
|---|---|---|---|
| Police officer | Flashing blue lights, headlights, siren or horn — usually from behind — then pointing and/or a left indicator. | Rule 106 — MUST pull over and stop, then switch off the engine | Any road |
| DVSA officer | Flashing amber lights — from the front asking you to follow them to a safe place, or from behind pointing and/or a left indicator. | Rule 107 — MUST obey any signals given | All roads, including motorways and trunk roads |
| Traffic officer | Flashing amber lights, usually from behind, then pointing and/or a left indicator. | Rule 108 — MUST pull over and stop, then switch off the engine | Most motorways and some A-class roads, England and Wales |
| Traffic warden | Hand signals. | Rule 105 — MUST obey | Any road |
| School crossing patrol | The sign, held up in stages from “not ready to cross” to “all vehicles must stop”. | Rule 105 — MUST obey | Any road |
The colour is the shortcut worth memorising. Blue is police. Amber is a traffic officer or DVSA. Both of the amber ones can stop you and both carry a MUST — the one difference is that amber lights shown from the front by a DVSA officer are asking you to follow them to a safe place to stop, not to stop where you are.
Traffic officers and DVSA officers use hand and light signals similar to those the police use, and the Code is explicit that you MUST obey any signals given. So the beckoning arm you would recognise from a constable at a broken traffic light means the same thing from an officer in a high-visibility jacket beside a closed lane.
What the Traffic Management Act 2004 actually handed over
Traffic officers exist because Parliament moved a defined slice of motorway traffic management off the police. The explanatory notes to the Act put the purpose plainly.
The Act enables some traffic management functions on motorways and other trunk roads currently carried out by the police to be carried out by traffic officers.
The job those notes describe is managing the traffic consequences of random incidents — collisions, obstructions, debris, breakdowns — and programmed events such as the passage of abnormal loads. The powers follow from that job and stop there. Section 5 of the Act defines a traffic officer’s “special powers” as the ones conferred by sections 6 and 7 and by orders made under section 8, and attaches a hard condition to using any of them.
A traffic officer may not exercise his special powers on a road unless he is in uniform.
Section 6 is the one Rule 108 rests on. It gives a traffic officer engaged in the regulation of traffic the power to direct a driver to stop the vehicle, or to make it proceed in or keep to a particular line of traffic; to direct people on foot to stop; and a standalone power to direct a driver or cyclist on a road to stop. Section 7 gives them a constable’s power to place and maintain temporary traffic signs. Section 9 deals with the removal of vehicles by traffic officers.
Section 6 does not create a new offence for ignoring all this. It does something neater — it edits two of the existing police powers in the Road Traffic Act 1988 to name traffic officers alongside constables.
Where a constable or traffic officer is for the time being engaged in the regulation of traffic in a road, a person driving or propelling a vehicle who neglects or refuses—(a) to stop the vehicle, or (b) to make it proceed in, or keep to, a particular line of traffic, when directed to do so by the constable in the execution of his duty or the traffic officer (as the case may be) is guilty of an offence.
A person driving a mechanically propelled vehicle on a road must stop the vehicle on being required to do so by a constable in uniform or a traffic officer.
That is why Rule 108’s Law line reads RTA 1988 sects 35 & 163 as amended by TMA sect 6. You are not committing some lesser administrative breach when you drive past a traffic officer’s stop signal. You are committing the same offence you would commit driving past a constable’s.
What ignoring a direction costs
| What you did | Where the offence lives | Consequence |
|---|---|---|
| Ignored a traffic officer’s or constable’s direction to stop or to keep to a line of traffic | RTA 1988 s.35, as amended by TMA 2004 s.6 | A fine of up to £1,000, with possible endorsement or disqualification |
| The endorsement itself | Code TS40 — failing to comply with direction of a constable/warden | 3 penalty points, staying on your record for 4 years from the date of the offence |
| Drove in a lane closed by a red X | Rule 258 — MUST NOT; RTA 1988 ss.35 & 36 and the motorway traffic regulations | Lane and road closures shown by red flashing lights are enforced by the police |
| Resisted or wilfully obstructed an officer doing their job | TMA 2004 s.10(2) | Up to one month’s imprisonment or a level 3 fine, or both — section 10(6) reads the Act’s printed 51 weeks down to one month while section 281(5) of the Criminal Justice Act 2003 remains uncommenced |
Three points on a new licence is not an abstract number. Under the New Drivers Act the probationary threshold is six, so a single TS40 puts you halfway to a revocation inside your first two years — the arithmetic is worked through in our guide to the New Drivers Act.
Section 10 of the Act runs the other way too. Assaulting a traffic officer in the execution of their duties is an offence, and so is impersonating one — including making a statement calculated to suggest falsely that you hold the post or have powers you do not. Both carry a level 5 fine and, while section 281(5) of the Criminal Justice Act 2003 remains uncommenced, up to six months’ imprisonment rather than the 51 weeks printed in the Act.
A person who resists or wilfully obstructs a traffic officer in the execution of his duties is guilty of an offence and liable, on summary conviction, to imprisonment for a term not exceeding 51 weeks or to a fine not exceeding level 3 on the standard scale (or both).
Where a traffic officer’s direction overrides the normal rule
The stop signal is the headline, but several motorway rules are written so that a direction from a traffic officer changes what you are allowed to do. These are the ones the question bank leans on.
The hard shoulder. The default is absolute, and the exception names them.
Hard shoulder (where present). You MUST NOT use a hard shoulder except in an emergency or if directed to do so by the police, traffic officers or a traffic sign.
So “there was an officer waving me onto it” is not a defence people invent — it is the exception written into the rule. What it does not license is using the hard shoulder because traffic is slow, or because you want to leave at the next junction. Emergency areas, on stretches with no hard shoulder or where the hard shoulder runs as an extra lane, MUST only be used in an emergency under Rule 270.
Passing an incident. Rule 281 puts an officer’s arm above your own reading of the road, and its Law line is the same pair of sections that sit under Rule 108.
You MUST follow any directions given by police or traffic officers as to whether you can safely pass the incident or obstruction.
That settles a common misreading: a lane may look open, the queue behind you may be furious, and the officer’s arm still decides. Rule 277 is the companion rule for when the stopped vehicle is yours — leave at the next exit if you can, otherwise go left into an emergency area or onto the hard shoulder, and if you cannot get there safely, stay in the vehicle with your seat belt and hazard lights on and call 999 for the police. Rule 275 defines the place of relative safety you are being directed towards — a lay-by, an emergency area or the hard shoulder — and our guide to what you MUST do after a collision covers the reporting duties that start once you are there.
Signals overhead. Officers are usually the reason the gantry changed. Amber flashing lights under Rule 257 warn of a hazard ahead: reduce speed, be ready, and only speed up again once you pass a signal that is not flashing, or a sign showing the national speed limit or the word END, and you are sure it is safe.
Red flashing light signals and a red ‘X’ on a sign identify a closed lane in which people, stopped vehicles or other hazards are present.
Rule 258 makes it a MUST to follow the instructions on signs in advance of a closed lane so that you move safely into an open lane, and a MUST NOT to drive in a closed lane. The people the red X is protecting are very often the traffic officers themselves, standing on a live carriageway. Recent Highway Code changes tracks how this section has been tightened.
They are not police, and it changes less than people think
The identity question generates more argument online than the rule does — the orange-and-black 4x4s get flagged as police on navigation apps every day of the week. The organisation is direct about the distinction.
we’re not an enforcement organisation
Traffic officers do not issue speeding tickets, do not enforce traffic law and are not constables. What they can do is stop and direct traffic, close lanes and carriageways, place temporary signs and manage traffic — and pass evidence to the police if they witness dangerous driving or another offence. National Highways points the public at 101, or 999 if it is urgent, for anything that needs enforcing.
That has one practical consequence and one non-consequence.
- The non-consequence: it does not soften Rule 108 by a single word. The direction is backed by RTA 1988 sections 35 and 163, and ignoring it is a criminal offence whether or not the person giving it can write you a ticket for anything else.
- The consequence: treating a traffic officer as a police officer on the road costs you nothing, and treating one as a jobsworth in a hi-vis costs you three points.
The role is also purely English and Welsh. Part 1 of the Act extends to England and Wales, and Rule 108 says so on its face — so a Scottish motorway stop is either a police stop under Rule 106 or a DVSA stop under Rule 107, where amber lights still carry a MUST; and Northern Ireland runs its own Highway Code, whose Rule 107 gives Driver and Vehicle Agency enforcement officers the same amber-light power on all roads including motorways.
Common test questions and the answers
“Traffic officers aren’t police, so do I actually have to stop?”
Yes. Rule 108 uses MUST, and the Law line points at sections 35 and 163 of the Road Traffic Act 1988 as amended by section 6 of the Traffic Management Act 2004. Neglecting or refusing to stop when directed is an offence, and it endorses under code TS40 with 3 penalty points.
“How do I know it’s a traffic officer and not a police car?”
Colour. Police attract your attention with flashing blue lights, headlights, a siren or a horn under Rule 106. Traffic officers and DVSA officers use flashing amber lights under Rules 108 and 107. All three carry a MUST. Where the signal comes from behind, the action is the same — pull over and stop as soon as it is safe, then switch off the engine. The one exception is a DVSA officer flashing amber from the front: that is asking you to follow them to a safe place to stop, not to stop where you are.
“What do I do once I’ve pulled over?”
Exactly what Rule 108 says, in order: pull over and stop as soon as it is safe to do so, then switch off your engine. Rule 106 gives the police version in the same words. The rules do not ask you to get out, and on a motorway hard shoulder you would be a great deal safer not doing so unless you are told to.
“Can a traffic officer give me a speeding ticket?”
No. National Highways is not an enforcement organisation and traffic officers do not enforce traffic law. They can pass on what they see to the police, and lane and road closures shown by red flashing lights are enforced by the police too. Their own powers are the ones the Act lists: stopping and directing traffic, closing lanes and carriageways, placing temporary signs and removing obstructing vehicles.
“An officer directed me onto the hard shoulder. Isn’t that a MUST NOT?”
Rule 269 says you MUST NOT use a hard shoulder except in an emergency or if directed to do so by the police, traffic officers or a traffic sign. A direction from an officer is one of the three named exceptions, so following it is the rule rather than a breach of it.
“Do traffic officers work in Scotland and Northern Ireland?”
No. Rule 108 limits the power to most motorways and some A-class roads in England and Wales, and Part 1 of the Traffic Management Act 2004 extends to England and Wales only. Elsewhere in Great Britain a motorway stop comes from the police under Rule 106 or from a DVSA officer under Rule 107, whose power covers all roads; Northern Ireland has its own Highway Code and sits outside these rules entirely.
“Where does this sit next to lane discipline questions?”
Separately, and both come up. Rule 108 is about obeying a person; Rules 264 to 268 are about where you sit when nobody is directing you at all. Our guide to motorway lane discipline and undertaking covers the second half, and driving offences you might not know about covers the penalties that attach to the rest.
Where this shows up in revision
Signals from authorised persons sit in the Road and traffic signs section of the question bank, and Rules 253 to 273 belong to Motorway rules — expect the amber-versus-blue distinction in the first and the red X and hard shoulder in the second. Read Rules 103 to 112 and 253 to 273 in the Highway Code together, since the second only makes sense once the first has told you who is allowed to overrule a sign. Keep the glossary open for the Law-line abbreviations, work through the 14 DVSA topics, and sit a full mock theory test under the real timer. It is free to get started.
Sources
- GOV.UK — Highway Code: general rules, techniques and advice for all drivers and riders (Rules 105, 106, 107, 108)
- GOV.UK — Highway Code: signals by authorised persons
- GOV.UK — Highway Code: motorways (Rules 257, 258, 264 to 270)
- GOV.UK — Highway Code: breakdowns and incidents (Rules 275, 277, 281)
- legislation.gov.uk — Traffic Management Act 2004, Part 1 (traffic officers)
- legislation.gov.uk — Traffic Management Act 2004, section 5 (the special powers of a traffic officer)
- legislation.gov.uk — Traffic Management Act 2004, section 6 (powers to stop or direct traffic)
- legislation.gov.uk — Traffic Management Act 2004, section 10 (offences)
- legislation.gov.uk — Traffic Management Act 2004: explanatory notes, Part 1
- legislation.gov.uk — Road Traffic Act 1988, section 35 (drivers to comply with traffic directions)
- legislation.gov.uk — Road Traffic Act 1988, section 163 (power to stop vehicles)
- GOV.UK — Endorsement codes and penalty points (code TS40)
- GOV.UK — Highways England: about our services (withdrawn 17 August 2022) (traffic officer powers and the penalty for failing to obey a direction)
- National Highways — National Highways: What we do
Highway Code excerpts are reproduced under the Open Government Licence v3.0.