Radar speed signWorldwide
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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.
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.
🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example
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.
🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example
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.
🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example
Does the radar sign end the speed limit?
No. Passing a camera or radar sign does not end the applicable speed restriction.
🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example
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.
🔗 gov.uk • Great Britain Highway Code, Rules 124–126; national guidance example

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