Customs stop
Regulatory signsSign no. 2.51OSR art. 31
What the sign says
The sign obliges drivers to stop at the customs office. It is an order to stop, not an invitation to slow down.
The exam trap
If the customs authorities temporarily waive the check, you still do not pass freely: the customs area is then crossed at 20 km/h at most.
Study topic
Documents and admin
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.