C51: No overtaking

C51 · Prohibitory signs

No overtaking

På dansk Overhaling forbudt

What it means
Overtaking is prohibited, with specified exceptions including two-wheeled bicycles and two-wheeled small mopeds. Other safety rules still apply.
Your action
Do not overtake a car or motorcycle here. The sign has specific exceptions for two-wheeled bicycles and small mopeds.
Common mistake
A clear view does not cancel the ban. A motorcycle is not one of the bicycle/small-moped exceptions.

Source check: 2026-10-16 · Order §19; curriculum 7.9. Road markings order 425, 13 April 2023 · Færdselsstyrelsen — category B, May 2026

C Round with a red border: something is forbidden - entry, a manoeuvre, a speed, parking.

Learn it in lesson 03 → All signs

In the course

Neighbours of this sign in the C group.
C36Axle-group and single-axle load limitC41Width limit including loadC42Height limit including loadC43Length limit including loadC52No overtaking by trucksC53End of no overtakingC54End of the truck overtaking prohibitionC55Local speed limit

Drawing from Wikimedia Commons, free of copyright under section 9 of the Danish copyright act. Code and name follow executive order 425 of 13 April 2023 on road marking. Study material, not the legal text.

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