Definition
Warning triangles (V-12) were, until 2026, the mandatory pre-signalling system for an immobilised vehicle. They were placed 50 m in front of and 50 m behind the car on interurban roads. Their use forced the driver to leave the vehicle and walk on the shoulder, one of the most dangerous situations on the road.
Key facts
- Mandatory on interurban roads until 31 December 2025.
- Placed 50 m in front and 50 m behind, visible at 100 m.
- From 2026, replaced by the connected V-16 beacon linked to DGT 3.0.
- Their main risk was forcing the driver onto the shoulder of high-speed roads.
Practice real questions on this topic
Free DGT 2026 test with official questions and explanations. No signup.
Real Warning triangles (V-12) questions (B licence)
- ¿Cuál de estos NO es un dispositivo de alumbramiento en el vehículo?
- Una hilera de luces amarillas fijas o intermitentes…
- Si debido a una avería, un vehículo queda inmovilizado en el interior de un túnel, su conductor, siempre que sea posible deberá...
- Para evitar ruidos excesivos e innecesarios, el conductor de una motocicleta debe...
- ¿Es obligatorio llevar iluminada la placa posterior de la matrícula durante la noche?
- Al distraerse, el conductor tarda...
- Su vehículo se incendia y no tiene extintor. ¿Cómo debe apagarlo?
- Conduciendo una motocicleta, ¿está permitido llevar el casco desabrochado?
More glossary terms
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- Blind spot— Area around a vehicle that the driver cannot see using the m…
- Adaptive lights— Headlight system that adapts beam shape or intensity to road…