Danger signs (series A): list and meaning

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Belgian danger signs (series A): shape, meaning and list of main triangular signals. What you need to know for the theory test.

Recognise triangular warning signs with red borders and know how to react during the test as you would on the road.

The warning signs of series A have the shape of a triangle with a red border . They warn you of a danger in advance and require you to exercise caution, often by reducing your speed. Here is how to recognise them and the list of the main signals you need to know for the theory test. What does a warning sign look like? A warning sign is an equilateral triangle, pointing upwards, with a white background and red border, with a black symbol in the centre. It is placed before the danger to give you time to adapt your driving. What must you do when you see a warning sign? A warning sign does not forbid anything, but it requires vigilance: slow down if necessary, be ready to stop and adapt your speed to the danger announced. In the test, the correct answer almost always involves exercising extra caution. The main warning signs (series A) Code Meaning A1c Dangerous bend (left, right or successive) A3 Steep descent A7 Road narrows A9 Movable bridge A13 Speed bump or hump (traffic calming) A15 Slippery road A19 Falling rocks A21 Pedestrian crossing A23 Area frequented by children A25 Cycle crossing A31 Roadworks A33 Traffic lights A41 / A43 Level crossing with or without barriers A51 Other

danger (specified by an additional sign) Common mistakes in the test Confusing a warning sign (triangle) with a prohibition (red circle). Forgetting that the danger is warned of in advance, not at the exact location of the sign. Not matching the correct symbol to the correct situation (speed bump, slippery road, etc.). Remember: triangle with red border = danger warned of in advance. You do not necessarily have to stop, but you must always adapt your speed and remain alert. Learn more View all warning signs with their images Practice questions on signs Read the complete guide to Belgian signs Frequently asked questions What is the shape of a warning sign? A warning sign is a triangle with a white background and red border, pointing upwards, with a black symbol. Does a warning sign require you to stop? No. It warns of a danger and requires caution, but does not require you to stop unless the situation demands it. Where is the danger located in relation to the sign? The danger is located after the sign: the sign is placed in advance to give you time to react.