Minimum distance
Regulatory signsSign no. 2.47OSR art. 28
What the sign says
Motor vehicles and articulated vehicles whose registered total weight exceeds 3.5 t must keep at least the distance shown between them. A supplementary plate gives the length of the stretch.
The exam trap
The sign does not target cars, but they are not released from the general rule: the gap must let you stop behind whoever brakes.
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.