Radar speed signFlanders
Traffic rules
Flanders
39. 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.
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Is there an official national radar traffic sign in Belgium?
No. The Belgian Highway Code does not currently include a numbered national traffic sign specifically indicating speed radar enforcement.
Does Wallonia use a radar warning sign?
Yes. Wallonia uses a blue information board displaying a radar symbol and the word RADAR. It is a regional information sign and is not included among the numbered signs of the Belgian Highway Code.
Does the Walloon radar board impose a speed limit?
No. It announces speed enforcement but does not establish a numerical limit. Drivers must follow the applicable C43 sign, speed zone or general speed limit.
Is the Walloon radar board a prohibition sign?
No. It is an informational warning board. The legal obligation not to exceed the speed limit exists independently of the radar board.
Are permanent radars announced in Wallonia?
Yes. Walloon policy provides road signage announcing permanent automatic speed-enforcement systems.
Can speed checks occur without that Walloon radar board?
Yes. Mobile police controls and other lawful speed checks may occur without the regional radar-information board.
What is a fixed radar in Wallonia?
A fixed radar performs a continuous speed check at one particular location.
What is a red-light radar?
A red-light radar can monitor vehicles passing a red traffic light and may also measure their speed.
What is section control?
Section control, also called average-speed enforcement, records vehicles at different points and calculates their average speed over the controlled road section.
How long can a Walloon average-speed section be?
Walloon guidance describes controlled sections ranging from approximately 500 metres to several kilometres.
Does slowing at the final camera guarantee compliance?
No. The system calculates average speed across the complete controlled section.
What is a temporary lidar control?
A lidar is a temporary automatic speed-control installation that may be placed beside the road, including near roadworks.
How is lidar at Walloon roadworks announced?
Wallonia uses a temporary orange board displaying the words RADAR CHANTIER and a radar symbol to announce certain worksite controls.
Does the RADAR CHANTIER board create the roadworks speed limit?
No. The applicable temporary C43 sign or another speed rule creates the limit. The radar board only warns that it may be enforced.
What is a preventive radar display?
A preventive radar measures an approaching vehicle and displays its detected speed to encourage the driver to respect the limit.
Does a preventive radar normally issue a fine?
No. Its primary function is awareness and prevention rather than enforcement.
Can a preventive display collect information?
Yes. It may collect statistical information about measured vehicle speeds to help authorities assess speeding problems.
Does the speed shown by the display replace your speedometer?
No. It provides information, but drivers remain responsible for monitoring their own speed and respecting the legal limit.
What should you do when the display shows that you are too fast?
Release the accelerator and reduce speed smoothly and safely. Do not brake suddenly when another vehicle is close behind.
Does passing the radar end a Belgian speed restriction?
No. A speed limit ends only according to the applicable signs and road rules, not because the camera has been passed.
Can Belgium use mobile radar without permanent roadside equipment?
Yes. Police may use mobile speed-measuring equipment at temporary control locations.
Can Belgian cameras monitor several offences?
Yes. Certain systems can combine speed enforcement with red-light enforcement or automatic number-plate recognition.
Is a navigation-system radar warning legally authoritative?
No. Navigation and mobile applications may contain incomplete or outdated information. Traffic signs and the actual speed rules always take precedence.
Can the legal limit differ by vehicle category?
Yes. A truck, bus, coach or vehicle combination may have a lower maximum speed than a passenger car even when using the same road.
Are speeding penalties based directly on the roadside display?
No. Enforcement requires approved measuring equipment and the legally prescribed procedure. A preventive display is not itself proof of an offence.
Will Belgium’s new road code introduce a national radar sign?
The published Code of the Public Road taking effect on 1 June 2027 does not list a numbered national radar-warning sign. The Walloon board remains separate from the national traffic-sign catalogue unless the regional rules are changed.
