What it means
The Spanish DGT sign R-400B belongs to the regulatory signs family (circular (red or blue)). It means: sentido compulsory. As with every sign in this family, the theory exam typically combines it with right-of-way, speed-limit or general-traffic-rule questions — so it pays to memorise both the visual and the context in which it appears.
- Category
- Regulatory signs
- Shape
- Circular (red or blue)
Practise DGT questions featuring this sign
Ten official questions about signs from the 2026 DGT bank, with an explanation after each. Free, no signup.
