Minimum speed

Regulatory signsSign no. 2.31OSR art. 23

What the sign says

Blue disc, white figure: the speed you must not drop below when road, traffic and visibility are good.

The exam trap

Blue does not mean informative: it is a rule. A vehicle that cannot or may not reach that speed is not allowed to carry on.

Do not confuse

MotorwayOSR art. 45
End of maximum speed limitOSR art. 32
Maximum speed 120 km/hOSR art. 22 · OCR art. 4a

Study topic

Speed and distances

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.