Traffic radio frequency
Information signsSign no. 4.90OSR art. 62 · art. 89
What the sign says
The sign gives the national broadcaster and the frequency on which drivers receive traffic information.
The exam trap
Off motorways and expressways it stands only where the frequency band changes: its absence does not mean the service has stopped.
Study topic
Motorway and expressway
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.