What it means
The Spanish DGT sign S-21 belongs to the information signs family (rectangular or square, blue). It means: 1 transitabilidad on tramo o puerto of montana. 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
- Information signs
- Shape
- Rectangular or square, 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
S-570A
Hito kilometrico on motorway of peaje
S-571
Hito kilometrico on motorway y dual carriageway que ademas forma parte of un itinerario europeo
S-572
Hito kilometrico on conventional road
S-573
Hito kilometrico on itinerario europeo
S-574
S 574a s 574b hito miriametrico on motorway dual carriageway conventional road y motorway of peaje
S-575
Hito miriametrico
S-600
Confirmacion of poblaciones on un itinerario por conventional road
S-602
Confirmacion of poblaciones on un itinerario por motorway o dual carriageway