Advance direction sign for particular vehicle classes

Information signsSign no. 4.23OSR art. 54

What the sign says

A vehicle symbol — usually the lorry — marks the route meant for that class, announced ahead of the junction.

The exam trap

The route is not a duty in itself: it binds only where a signposted ban closes the other way.

Do not confuse

Direction sign for particular vehicle classesOSR art. 54
Advance direction sign, main roadOSR art. 52
No lorriesOSR art. 19

Study topic

Signs and road markings

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.