Tunnel

Information signsSign no. 4.07OSR art. 45 · OCR art. 39

What the sign says

The stretch runs through a tunnel, where special rules apply: lights must stay on, and reversing and turning round are forbidden.

The exam trap

You stop in a tunnel only if you must, and the engine has to be switched off at once. On the motorway, the tunnel's name appears by the sign at the entrance.

Do not confuse

Maximum heightOSR art. 21
Minimum distanceOSR art. 28
No U-turnOSR art. 27 · OCR art. 36

Study topic

Vehicle and technology

Practise this topic All signs

The signs are the official depictions by the Federal Roads Office, from the annexes of the Signalling Ordinance (SR 741.21): official works, unprotected under Art. 5 of the Copyright Act. The explanations, by contrast, are written from federal law — never taken from a third-party catalogue.