What it means
The Spanish DGT sign S-821 belongs to the information signs family (rectangular or square, blue). It means: extension of the prohibicion a un lado. 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-235
Presenalizacion con senales sobre la carriageway on motorway o dual carriageway hacia cualquier carretera
S-235A
Presenalizacion con senales sobre la carriageway on motorway o dual carriageway hacia cualquier carretera y direction propia
S-242
Presenalizacion on motorway o dual carriageway of dos salidas muy proximas hacia cualquier carretera
S-242A
Presenalizacion on motorway o dual carriageway of dos salidas muy proximas hacia cualquier carretera y direction propia
S-250
Presenalizacion of itinerario
S-260
Presenalizacion of carriles
S-261
Presenalizacion on conventional road of zona o area of servicios
S-263
Presenalizacion on motorway o dual carriageway of una zona o area of servicios con salida compartida