RoadworksBrussels
35. Roadworks
Roadworks are construction, maintenance, repair or inspection activities carried out on or beside a road. They may temporarily change the road layout, lane widths, speed limits, priority, permitted directions and facilities for pedestrians or cyclists.
Drivers must follow the temporary signs, traffic lights, barriers, road markings and instructions from authorised personnel. They should reduce speed, increase their following distance and remain prepared for narrow lanes, stopped traffic, workers, machinery and sudden changes in the route.
Wikimedia.org • Jeanhousen • CC BY-SA
Which Belgian sign warns of roadworks?
Traffic sign A31 warns that roadworks are being carried out on or beside the public road.
Warning for roadworks.
English • Traffic sign A31 • Roadworks.
Français • Signal routier A31 • Travaux.
Nederlands • Verkeersbord A31 • Werken.
Sources
SVG source: Commons.wikimedia.org
Vascer • Public domain. Original SVG unmodified.
🔗 Wegcode.be • Artikel 66. Gevaarsborden (NL)
🔗 Codedelaroute.be • Article 66. Signaux de danger (FR)
Must you reduce speed after a Belgian roadworks warning sign?
Yes, when necessary. Drivers must adapt their speed to the temporary layout, traffic, workers, machinery, visibility and condition of the road.
What if your lane ends at Belgian roadworks?
Observe the lane-reduction signs and markings. In flowing traffic, changing lanes is a manoeuvre and you must give way to drivers already using the target lane.
What should cyclists do when a bike path is closed?
Follow the signed temporary route. When leaving an obstructed bike path, check traffic carefully and make the lateral movement safely.

Traffic rules
Brussels