What it means
The Spanish DGT sign R-306 belongs to the regulatory signs family (circular (red or blue)). It means: adelantamiento prohibited para camiones. 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.
Other related signs
R-106
No entry a vehicles destinados al transporte of mercancias
R-107
No entry a vehicles destinados al transporte of mercancias con mayor masa autorizada que la indicada
R-108
No entry a vehicles que transporten dangerous goods
R-109
No entry a vehicles que transporten mercancias explosivas o inflamables
R-110
No entry a vehicles que transporten productos contaminantes del agua
R-111
No entry a vehicles agricolas of motor
R-112
No entry a vehicles of motor con remolque que no sean un semirremolque o un remolque of un solo eje
R-113
No entry a vehicles of traccion animal