Additional signsUnited Kingdom

An introduction to the traffic rules and road signs of United Kingdom. Learn about driving, road safety and much more in our illustrated book, with answers to frequently asked questions.

For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.

Traffic signs

Traffic rules

An additional sign is a traffic sign placed directly below another sign to provide extra information or clarify how the main sign should be understood. It can specify conditions such as distance, time periods, road users affected, directions, or special circumstances. Additional signs do not create new rules by themselves but modify, limit, or explain the meaning of the sign above them so drivers can apply the rule correctly in that specific situation.

Flammable or explosive goods prohibited.

Vehicle access prohibited during the time shown.

High vehicles use the middle of an arch bridge.

Oncoming vehicles in the middle of the road.

Why must I read a supplementary plate?

It can qualify the main sign by identifying an exception, a time period or the distance to a restriction. Read the complete assembly rather than applying only the main symbol.

🔗 gov.uk • UK Department for Transport, Regulatory signs

1. For people with disabilities

This supplementary sign indicates that the main traffic sign applies specifically to people with disabilities. Any permit or eligibility requirements depend on the applicable sign and local rules.

English • TSRGD S2 P2 item 24 • Disabled people. Disabled pedestrians are likely to cross ahead. This plate accompanies the appropriate pedestrian warning sign. Read this supplementary plate together with the sign it qualifies.

Sources

🔗 Commons.wikimedia.org (UK Government • Crown copyright • OGL v1.0)
🔗 Legislation.gov.uk • Traffic Signs Regulations and General Directions • Great Britain
🔗 Gov.uk • Department for Transport • Know your traffic signs

SVG source: UK Government • OGL v1.0 • Original revision 2012-06-25. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Gov.uk • official published diagram 547.4.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

2. For blind people

This supplementary sign indicates that the main traffic sign specifically concerns blind or visually impaired people.

English • TSRGD S2 P2 item 24 • Blind people. Blind pedestrians are likely to cross ahead. Allow extra time and take particular care. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 547.4.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

3. For children with disabilities

This supplementary sign indicates that the main traffic sign specifically concerns children with disabilities.

English • TSRGD S2 P2 item 25 • Disabled children. Disabled children may be crossing ahead. This plate accompanies the children warning sign. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 547.7.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

4. For deaf people

This supplementary sign indicates that the main traffic sign specifically concerns deaf or hearing-impaired people.

English • TSRGD S2 P2 item 25 • Deaf children. Deaf children may be crossing ahead. This plate accompanies the children warning sign. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 547.7.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

5. For tractors

This supplementary sign indicates that the main traffic sign applies specifically to tractors.

English • TSRGD S2 P2 item 34 • Farm traffic. Agricultural vehicles may be in or joining the road ahead. The plate qualifies the agricultural-vehicle warning. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 553.2.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

6. Buses allowed

This supplementary sign indicates that buses are allowed where the main traffic sign would otherwise restrict their access or use. The bus categories covered depend on the applicable local definitions.

English • GB diagram 954.5–954.7 • Except buses. Buses are excepted from the restriction conveyed by the associated sign. Other restrictions remain applicable. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 954.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

7. Buses and cyclists allowed

This supplementary sign indicates that buses and cyclists are allowed where the main traffic sign would otherwise restrict their access or use.

English • GB diagram 954.5–954.7 • Except buses and cycles. Buses and pedal cycles are excepted from the restriction conveyed by the associated sign. In Great Britain, the cycle exception also represents authorised trial electric scooters where applicable. Read this supplementary plate together with the sign it qualifies.

Sources

SVG source: UK Government • OGL v1.0 • Original revision 2012-06-24. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Gov.uk • official published diagram 954.3.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

8. Local buses allowed

This supplementary sign indicates that local buses are allowed where the main traffic sign would otherwise restrict their access or use. The buses qualifying as local services depend on the applicable local rules.

English • GB diagram 954.5–954.7 • Except local buses. Local buses are excepted from the restriction conveyed by the associated sign. This exemption is narrower than an exemption for every bus or coach. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 954.2.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

9. Delivery vehicles allowed

This supplementary sign indicates that delivery vehicles are allowed where the main traffic sign would otherwise restrict their access, use or parking. The vehicles and activities covered depend on the applicable local rules.

English • TSRGD S3 P3 • Except for loading by goods vehicles. Goods vehicles may enter for loading or unloading where this exemption qualifies the prohibition. It is not a general exemption for all deliveries or all vehicles. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 620.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

10. Local traffic allowed

This supplementary sign indicates that local traffic is allowed where the main traffic sign would otherwise restrict access. Which journeys or road users qualify as local traffic depends on the applicable local rules.

English • TSRGD S3 P3 • Except for access. The associated prohibition has an access exemption. Access is to premises or land adjacent to the restricted road where there is no other route; through traffic is not exempt. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 620.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

11. Motor vehicles prohibited

This supplementary sign indicates that the prohibition shown by the main traffic sign applies to motor vehicles. The vehicle categories covered depend on the applicable local definitions.

English • TSRGD S3 P3 • No vehicles. The associated restriction prohibits all vehicles, except non-mechanically propelled vehicles pushed by pedestrians and any further exemptions shown. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 618.1A.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

12. Explosive materials prohibited

This supplementary sign indicates that vehicles carrying explosive materials are prohibited where the main traffic sign applies.

English • TSRGD S3 P3 paragraph 16 • No explosives. The associated dangerous-load prohibition applies to vehicles carrying explosives. Read this supplementary plate together with the sign it qualifies.

Sources

🔗 Commons.wikimedia.org (Department for Transport • Crown copyright • OGL v1.0)
🔗 Legislation.gov.uk • Traffic Signs Regulations and General Directions • Great Britain
🔗 Gov.uk • Department for Transport • Know your traffic signs

SVG source: Department for Transport • OGL v1.0 • Original revision 2012-06-24. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Assets.publishing.service.gov.uk • official published diagram 622.9.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

13. Flammable or explosive goods prohibited

This supplementary sign indicates that vehicles carrying flammable or explosive goods are prohibited where the main traffic sign applies.

English • TSRGD S3 P3 paragraph 16 • No inflammables or explosives. The associated dangerous-load prohibition applies to vehicles carrying inflammable substances or explosives. Read this supplementary plate together with the sign it qualifies.

Sources

SVG source: Department for Transport • OGL v1.0 • Original revision 2019-10-20. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Assets.publishing.service.gov.uk • official published diagram 622.9.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

14. No loading

This supplementary sign indicates that loading or unloading goods is prohibited where the main traffic sign applies.

English • TSRGD S4 P4 • No loading at any time. Loading and unloading are prohibited at all times in the signed area. Read the associated kerb markings and signs for the extent. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 638.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

15. yards to the left

This supplementary sign indicates that the main traffic sign refers to a location the indicated distance in yards to the left.

English • TSRGD S2 • Distance and direction to a hazard. The hazard or location identified by the associated sign is 250 yards to the left. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 573.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

16. yards ahead

This supplementary sign indicates the distance from the main traffic sign to the point where the indicated danger, regulation or information begins. The distance is shown in yards.

English • TSRGD S2 • Distance to a hazard. The hazard or location identified by the associated sign is 400 yards ahead. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 572.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

17. miles ahead

This supplementary sign indicates the distance from the main traffic sign to the point where the indicated danger, regulation or information begins. The distance is shown in miles.

English • TSRGD S2 • Distance to a hazard. The hazard or location identified by the associated sign is 1 mile ahead. Read this supplementary plate together with the sign it qualifies.

Sources

SVG source: Department for Transport • OGL v1.0 • Original revision 2020-09-02. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Gov.uk • official published diagram 572a.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

18. Stop yards ahead

This supplementary sign announces a STOP sign at the indicated distance ahead. The displayed value shows the distance in yards to the upcoming STOP sign.

English • GB diagram 502 • Stop sign ahead. A junction controlled by a stop sign is 100 yards ahead. The plate accompanies the advance junction warning. Read this supplementary plate together with the sign it qualifies.

Sources

🔗 Commons.wikimedia.org (Government of the United Kingdom – Department for Transport • Crown copyright • OGL v1.0)
🔗 Legislation.gov.uk • Traffic Signs Regulations and General Directions • Great Britain
🔗 Gov.uk • Department for Transport • Know your traffic signs

SVG source: Government of the United Kingdom – Department for Transport • OGL v1.0 • Original revision 2026-05-21. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Gov.uk • official published diagram 502.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

19. Give way ahead

This supplementary sign announces a Give Way sign ahead. Where a distance is shown, it indicates the distance to the upcoming Give Way sign.

English • GB diagram 503 • Give-way sign ahead. A junction controlled by a give-way sign is 50 yards ahead. The plate accompanies the advance junction warning. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 503.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

20. For miles

This supplementary sign indicates the length of the section to which the main traffic sign applies. The length is shown in miles.

English • TSRGD S2 • Extent of a hazard. The warning or restriction indicated by the associated sign applies over the next 2 miles. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 570.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

21. Indicated height

This supplementary sign shows an indicated vehicle height. Read it together with the main traffic sign to determine how the height value affects the applicable rule or restriction.

English • TSRGD S2 P2 item 54 • Safe height under electrified cables. The safe vehicle and load height beneath the electrified overhead cables is 16 ft 6 in (5.0 m). This plate accompanies the overhead-cable warning. Read this supplementary plate together with the sign it qualifies.

Sources

🔗 Commons.wikimedia.org
🔗 Legislation.gov.uk • Traffic Signs Regulations and General Directions • Great Britain
🔗 Gov.uk • Department for Transport • Know your traffic signs

Image via Commons.wikimedia.org
UK Government • Public domain • Source revision 2023-08-26. Wikimedia original unmodified.

22. No loading during the days and times shown

This supplementary sign indicates that loading and unloading are prohibited during the days and times shown.

English • TSRGD S4 P4 • Timed loading prohibition. Loading and unloading are prohibited Monday to Friday, 8:00–9:30 am and 4:30–6:30 pm, in the direction of the arrow. Read the associated kerb markings for the extent. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 638.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

23. Vehicle access prohibited during the time shown

This supplementary sign indicates that vehicle access is prohibited during the time shown.

English • TSRGD S3 P3 • Timed vehicle prohibition with access exemption. Vehicles are prohibited from 10 am to 4 pm, except for access to premises or land where permitted by the restriction. Through traffic is not exempt; non-mechanically propelled vehicles pushed by pedestrians are excepted under the all-vehicles restriction. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 618.1B.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

24. Play street during time shown

This supplementary sign indicates that the play-street designation applies during the times shown.

English • TSRGD S3 P3 • Play Street. The associated vehicle prohibition applies from 8 am to sunset, with an access exemption. The street is designated for play during that period; non-mechanically propelled vehicles pushed by pedestrians are excepted under the all-vehicles restriction. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 618.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

25. Speed limit

This supplementary sign indicates that the displayed speed is a maximum speed limit.

English • GB diagram 513.2 • Maximum speed advised. A maximum speed of 20 mph is advised for the hazard. This rectangular advisory plate does not itself impose a mandatory speed limit. Read this supplementary plate together with the sign it qualifies.

Sources

SVG source: Government of the United Kingdom – Department for Transport • OGL v1.0 • Original revision 2026-06-11. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Gov.uk • official published diagram 513.2.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

26. Reduce speed now

This supplementary sign instructs or advises drivers to reduce speed immediately in connection with the situation indicated by the main traffic sign.

English • GB diagram 511 • Reduce speed now. Reduce speed now for the change in road layout or hazard ahead. Read this supplementary plate together with the sign it qualifies.

Sources

SVG source: Government of the United Kingdom – Department for Transport • OGL v1.0 • Original revision 2026-05-17. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Gov.uk • official published diagram 511.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

27. Slow trucks for miles

This supplementary sign warns that slow-moving trucks may be encountered over the indicated distance. The distance is shown in miles.

English • TSRGD S2 P2 item 49 • Slow lorries. Slow-moving lorries are likely on the incline for the next 2 miles. Be prepared for slower traffic. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 583.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

28. Low gear now

This supplementary sign instructs drivers to select a low gear from this point.

English • TSRGD S2 P2 items 18–19 • Low gear now. Select a low gear now for the steep gradient indicated by the associated warning sign. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 525.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

29. Keep in low gear

This supplementary sign instructs drivers to remain in a low gear over the section concerned.

English • TSRGD S2 P2 • Keep in low gear. Remain in a low gear while negotiating the indicated bend, gradient or other permitted hazard. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 526.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

30. Low gear for miles

This supplementary sign instructs drivers to remain in a low gear for the indicated distance. The distance is shown in miles.

English • TSRGD S2 P2 items 18–19 • Low gear for 1½ miles. Remain in a low gear over the next 1½ miles of the indicated gradient. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 527.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

31. Hidden dip

This supplementary sign warns of a dip in the road that may not be visible in advance.

English • TSRGD S2 P2 item 56 • Hidden dip. There is a dip ahead that may hide approaching vehicles or other hazards from view. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 563V9.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

32. Hump in yards

This supplementary sign indicates the distance to a speed hump ahead. The distance is shown in yards.

English • TSRGD S2 P2 item 43 • Hump. A road hump is 20 yards in the direction of the right-pointing arrow. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 557.4.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

33. Humps for yards

This supplementary sign indicates that a series of speed humps extends over the distance shown. The distance is shown in yards.

English • TSRGD S2 P2 item 43 • Humps. Road humps extend for 300 yards along the road indicated by the right-pointing arrow. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 557.3.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

34. Humped crossing

This supplementary sign indicates that the pedestrian crossing shown by the main traffic sign is raised.

English • GB diagram 547.8 • Humped crossing. The associated warning concerns a zebra, parallel or signal-controlled crossing situated on a road hump. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 547.8.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

35. Children crossing

This supplementary sign warns that children may cross the road.

English • TSRGD S2 P2 item 25 • Patrol. A school crossing patrol may operate at the location indicated by the children warning sign. Be prepared to stop when the patrol requires it. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 547.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

36. Cyclists crossing

This supplementary sign warns that cyclists may cross the road.

English • TSRGD S2 P2 item 26 • Cycles crossing. A cycle route crosses or joins the road at the warned location. The plate accompanies the cycle-route warning sign. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 950.1VCC.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

37. No footway for yards

This supplementary sign warns that no footway is available over the indicated distance. The distance is shown in yards.

English • TSRGD S2 P2 items 23 and 25 • No footway. There is no footway for the next 400 yards. Pedestrians may be walking in the carriageway. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 547.3.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

38. High vehicles use the middle of an arch bridge

This supplementary sign warns that an arch bridge has reduced clearance near its sides. High vehicles must use the middle of the road.

English • GB diagram 531.2 • Arch bridge. High vehicles need to use the middle of the road to pass beneath the arch bridge. Check clearance, and proceed only when the road is clear and it is safe. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 531.2.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

39. Give way to oncoming vehicles

This supplementary sign indicates that drivers must give way to oncoming traffic where the main traffic sign applies.

English • TSRGD S3 P3 • Give way to oncoming vehicles. The associated priority sign requires you to give way to traffic approaching from the opposite direction. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 615.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

40. Priority over oncoming vehicles

This supplementary sign indicates that drivers have priority over oncoming traffic where the main traffic sign applies.

English • TSRGD S11 P2 item 1 • Priority over oncoming vehicles. The associated sign gives you priority over traffic approaching from the opposite direction at the narrow section. Ensure it is safe before proceeding. Read this supplementary plate together with the sign it qualifies.

Sources

SVG source: Government of the United Kingdom – Department for Transport • OGL v1.0 • Original revision 2026-07-10. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Gov.uk • official published diagram 811.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

41. Oncoming vehicles in the middle of the road

This supplementary sign warns that oncoming vehicles may use the middle of the road.

English • TSRGD S2 P2 • Oncoming vehicles in the middle of the road. Expect oncoming vehicles near the centre of the road at the bend, hump bridge or tunnel indicated by the associated warning. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 575.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

42. Single-file traffic

This supplementary sign indicates that vehicles must proceed in a single line.

English • TSRGD S2 P2 items 13–15 • Single file traffic. The road is narrow enough that traffic must pass through in single file. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 518.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

43. Single-track road

This supplementary sign warns that the road ahead is a single-track road shared by traffic in both directions.

English • TSRGD S2 P2 items 13–14 • Single track road. The road is only wide enough for one line of vehicles. Use passing places and give way as necessary. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 519.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

44. One-way traffic

This supplementary sign indicates that the road concerned carries traffic in one direction only.

English • TSRGD S3 P3 • One way. The associated directional instruction is on a one-way road. Follow the indicated direction. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 607.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

45. Dual carriageway

This supplementary sign indicates a road with separate carriageways for opposing directions of traffic, divided by a central reservation or other separation.

English • TSRGD S2 P6 item 1 • Dual carriageway. The junction identified by the advance stop or give-way warning is with a dual carriageway road. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 608.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

46. Part-time signals

This supplementary sign indicates that the traffic signals operate only at certain times.

English • GB diagram 543.1 • Part time signals. The traffic signals identified by the associated warning operate only at certain times. Read this supplementary plate together with the sign it qualifies.

Sources

SVG source: Government of the United Kingdom – Department for Transport • OGL v1.0 • Original revision 2022-02-22. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Gov.uk • official published diagram 543.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

47. When lights show ahead

This supplementary sign indicates that the main traffic sign ahead applies only when the lights are illuminated.

English • GB diagram 548.1A • When lights show. With the supervised cattle-crossing warning, this plate indicates that the warning applies when the lights operate; the crossing is 200 yards ahead. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 548.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

48. When lights show

This supplementary sign indicates that the main traffic sign applies only when the lights are illuminated.

English • GB diagram 563.1 • Fire station — stop when lights show. Warning signals for the fire station are ahead. Stop when the alternating red lights show, allowing emergency vehicles to emerge.

Sources

Artwork verified against Gov.uk • official published diagram 563.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

49. Queues

This supplementary sign warns that queues or slow-moving traffic may be encountered ahead.

English • TSRGD S2 P2 item 50 • Queues likely. Traffic queues are likely ahead. Be ready to slow or stop. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 584.1.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

50. Accident

This supplementary sign warns of an accident or accident scene ahead.

English • TSRGD S13 P2 item 7 • Accident. An accident has created a temporary hazard ahead. Slow down and follow any traffic controls. Read this supplementary plate together with the sign it qualifies.

Sources

Artwork verified against Gov.uk • official published diagram 563.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

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