
What it means
The S-830 sign indicates the extension of a prohibition to both sides. It works as a supplementary panel for another main sign, extending its application to both sides of the signed place, normally for stopping, parking, or another restriction indicated by the sign it accompanies. It is usually placed below the main sign to specify the spatial scope of the prohibition. When you see it, do not interpret it alone: always read the upper sign and apply its prohibition to both sides according to the panel. In the test they often ask about its supplementary function and expect you not to confuse the panel with an independent prohibition or a mandatory direction.
- CategoryInformation signs
- ShapeRectangular or square, blue
Practise DGT questions featuring this sign
Ten DGT 2026 exam-style questions about signs, with an explanation after each. Free, no signup.
Other related signs

S-235A
Gives advance information with overhead signs on a motorway or dual carriageway for directions toward any road and the continuing direction

S-242
Gives advance information on a motorway or dual carriageway for two very close exits toward any road

S-242A
Gives advance information on a motorway or dual carriageway for two very close exits toward any road and the continuing direction

S-250
Gives advance notice of an itinerary

S-260
Gives advance information about lanes

S-261
Advance signing on a conventional road for a service zone or area

S-263
Gives advance information on a motorway or dual carriageway for a service zone or area with a shared exit

S-263A
Gives advance information on a motorway or dual carriageway for a service zone or area with an exclusive exit