Warning triangleFlanders
An introduction to the traffic rules and road signs of Flanders. 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.
267. Warning triangle
A warning triangle is a portable reflective safety device used to warn approaching traffic about a stopped, broken-down or crashed vehicle or another obstruction on the road. It should be placed far enough from the hazard to give other drivers time to react and should remain clearly visible. The required distance and situations in which a warning triangle must be used vary between countries, so drivers should know the local rules and keep the triangle easily accessible in the vehicle.
Wikimedia.org • Roulex 45 • CC BY-SA
Is a warning triangle mandatory in a car in Belgium?
Yes. Applicable motor vehicles must carry a warning triangle so that a stopped or broken-down vehicle can be signalled when required.
When must you use the warning triangle in Belgium?
Under the current rules, the triangle must be used when a vehicle or trailer cannot be moved or can only be left where stopping or parking is prohibited. It must also be used in certain cases when the vehicle’s lighting or signalling equipment is defective and the vehicle cannot be clearly seen from about 100 metres away.
Will the warning-triangle distances change under Belgium’s new Road Code?
Slightly. From 1 June 2027, the triangle should be placed approximately 100 metres away on divided roads with at least two lanes in each direction and approximately 30 metres away on other roads. These are no longer strict minimum distances, and the triangle may be placed closer when necessary for safety.
🔗 wegcode.be • Belgian current Road Code51 — presently operative triangle distances

Traffic rules
Flanders