Radar speed signWorldwide

An introduction to the traffic rules and road signs of Worldwide. 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.


54. Radar speed sign

A radar speed sign warns drivers that vehicle speeds may be monitored by a fixed camera, mobile radar, lidar or average-speed enforcement system. It reminds drivers to check and respect the applicable speed limit.

The sign does not normally establish the speed limit itself. Drivers must follow the general, posted or variable speed limit applying to the road and must not brake suddenly merely because speed enforcement is indicated.

Radar speed sign. (Joroinen, Finland)
Wikimedia.org • Dalibor Z. Chvatal • CC BY
What does a radar speed sign mean?

It warns that vehicle speeds may be measured or enforced on the road ahead or throughout a specified section.

🔗 mutcd.fhwa.dot.gov • US FHWA, MUTCD 11th Edition with Revision 1 (December 2025), sections 2B.69 and 2C.13, speed enforcement and speed feedback; US example

🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example

🔗 wetten.overheid.nl • Vienna Convention on Road Traffic, Article 13; international framework subject to national law

Is a radar speed sign the same as a speed-limit sign?

No. A speed-limit sign establishes the maximum legal speed. A radar sign only warns that compliance with an applicable limit may be monitored.

🔗 mutcd.fhwa.dot.gov • US FHWA, MUTCD 11th Edition with Revision 1 (December 2025), sections 2B.69 and 2C.13, speed enforcement and speed feedback; US example

🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example

🔗 wetten.overheid.nl • Vienna Convention on Road Traffic, Article 13; international framework subject to national law

Where can the applicable speed limit be found?

Check the most recent speed-limit sign, variable sign, speed-zone sign or general limit applying to the road and vehicle category.

🔗 mutcd.fhwa.dot.gov • US FHWA, MUTCD 11th Edition with Revision 1 (December 2025), sections 2B.69 and 2C.13, speed enforcement and speed feedback; US example

🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example

🔗 wetten.overheid.nl • Vienna Convention on Road Traffic, Article 13; international framework subject to national law

Does the radar sign end the speed limit?

No. Passing a camera or radar sign does not end the applicable speed restriction.

🔗 mutcd.fhwa.dot.gov • US FHWA, MUTCD 11th Edition with Revision 1 (December 2025), sections 2B.69 and 2C.13, speed enforcement and speed feedback; US example

🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example

🔗 wetten.overheid.nl • Vienna Convention on Road Traffic, Article 13; international framework subject to national law

What should you do when you are already exceeding the limit?

Release the accelerator and reduce speed smoothly and safely. Do not brake harshly or make an abrupt lane change.

🔗 mutcd.fhwa.dot.gov • US FHWA, MUTCD 11th Edition with Revision 1 (December 2025), sections 2B.69 and 2C.13, speed enforcement and speed feedback; US example

🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example

🔗 wetten.overheid.nl • Vienna Convention on Road Traffic, Article 13; international framework subject to national law

1 Worldwide 2 Motorway 3 Expressway 4 Residential area 5 Built-up area 6 Zone 7 Speed limit 8 Minimum speed 9 Advisory speed 10 Footpath 11 Bike path 12 Shared-use path 13 Separated path 14 Pedestrian warning 15 Tunnel 16 Bridge 17 Cycling street 18 Pedestrian zone 19 Speed bump 20 Toll road 21 Customs 22 One-way traffic 23 Quay 24 Slope 25 Bus lane 26 Bus stop 27 Dead end 28 Stop sign 29 Give way 30 Roundabout 31 Priority road 32 Road narrowing 33 Priority over oncoming traffic 34 Give way to oncoming traffic 35 Pedestrian crossing 36 Railway crossing 37 Mandatory direction 38 Turn prohibition 39 School area 40 Overtaking 41 Crossing animals 42 Slippery road 43 Rockfall 44 Aircraft 45 Curve 46 Chevron 47 Wrong-way driving 48 Roadworks 49 Crosswind 50 Height limit 51 Width limit 52 Length limit 53 Weight limit 54 Radar speed sign 55 Selective barriers 56 Low-emission zone 57 Intersection direction sign 58 Priority at the next junction 59 Traffic lights 60 Traffic lights warning 61 Pedestrian lights 62 Road markings 63 All-way stop 64 Junction layout 65 Climbing lane 66 Bike box 67 Left-hand traffic 68 Speed feedback 69 Driving licence 70 Location marker 71 Road number 72 Countdown markers 73 Public toilet 74 Rest area 75 Traffic mirror 76 Emergency telephone 77 International border 78 Pedestrian underpass 79 Cycling route 80 End of restriction 81 Parking 82 No parking 83 No stopping 84 Parallel parking 85 Park and ride 86 Kiss and ride 87 Alternate-side parking 88 Parking meter 89 Parking disc 90 Disabled parking 91 Traffic management 92 Merging 93 Reversing 94 U-turn 95 Carpool 96 Traffic jam 97 Detour 98 Uncontrolled crossroad 99 Road surface 100 Advisory cycle lane ...