What it means
The S-5 sign indicates a tunnel. It informs of the entrance or proximity of a covered stretch where visibility, ventilation, following distance, and attention to internal signing become especially important. It does not by itself impose a specific speed or replace the light signals, panels, or markings you may find inside. It is usually placed before the tunnel mouth or at its start. When you see it, increase attention, check lights when appropriate, avoid sudden changes, and respect the internal indications. In the test they often distinguish it from danger or service signs: it is an information sign for the tunnel.
- 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-351
Placed over the carriageway on a motorway or dual carriageway and indicates an immediate exit toward a conventional road
S-354
An overhead sign on a conventional road for an immediate exit toward a motorway or dual carriageway
S-355
Placed over the carriageway on a motorway or dual carriageway and indicates an immediate exit toward a motorway or dual carriageway
S-360
Placed over the carriageway on a conventional road and indicates an immediate exit toward a conventional road and the continuing direction
S-362
Placed over the carriageway on a conventional road and indicates an immediate exit toward a motorway or dual carriageway and the through direction
S-366
Placed over the carriageway on a motorway or dual carriageway to indicate an immediate exit toward a conventional road and the route continuing straight ahead
S-368
Placed over the carriageway on a motorway or dual carriageway and indicates an exit toward a motorway or dual carriageway and the continuing direction
S-371
Overhead signs on a conventional road with two immediate exits toward a conventional road and the road's own direction