Slippery roadDenmark
1. Slippery road
A slippery road has reduced tyre grip and can make steering, braking and acceleration less effective. Roads may become slippery because of rain, ice, snow, mud, oil, loose material or other substances on the surface. Drivers should reduce speed, increase their following distance and avoid sudden steering, braking or acceleration. Extra caution is needed in bends, on bridges and wherever the road surface changes unexpectedly.
What can make roads slippery in Denmark?
Be prepared for wet leaves, rain, frost and winter ice. A surface can become slippery even if it looks clear, and different parts of the road may have very different grip.
🔗 retsinformation.dk • Danish signing order BEK 425/2023 — operative sign and marking descriptions
How should you drive on a slippery road in Denmark?
Reduce speed early, increase the gap to the vehicle ahead and use smooth steering, braking and acceleration. Do not rely on the posted maximum as a safe target when grip is poor.
🔗 retsinformation.dk • Danish signing order BEK 425/2023 — operative sign and marking descriptions
Does a slippery-road warning sign in Denmark automatically impose a lower number?
The warning sign highlights a reduced-grip risk; it normally does not itself prescribe a new numerical speed limit. A separate speed-limit sign, temporary restriction or local condition may still apply. Travel below the legal maximum when necessary for safety.
🔗 retsinformation.dk • Danish signing order BEK 425/2023 — operative sign and marking descriptions
Warning for a slippery road surface.
English • Traffic sign A 31 • Slippery road. Indicates an unusually slippery carriageway. The cause must appear on a supplementary plate, such as ‘Slippery when wet’.
Dansk • Tavle A 31 • Glat vej. Tavlen angiver, at kørebanen kan være unormalt glat. Årsagen skal angives på undertavle, fx »Glat i vådt føre«.
Sources
🔗 Commons.wikimedia.org
🔗 Retsinformation.dk • Bekendtgørelse nr. 425/2023, § 13
SVG source: Gigillo83, drawn by original of Vejdirektoratet • Public domain • Original revision 2013-06-04. Wikimedia original unmodified.

Traffic rules
Denmark