Sign J35: Warning for reduced visibility because of snow, rain or fog

Legal meaning

Poor visibility due to snow, rain or fog.

Source: RVV 1990 annex 1 · checked 2026-10-23

Shape and colour

Triangle with a red rim and a black car in a cloud: warning of poor visibility through snow, rain or fog.

Where the sign stands

Outside the built-up area 100–150 m before the stretch that is often in fog, on the right; sometimes as a variable sign.

What the exam asks about this sign

The exam asks what to do in poor visibility: adjust speed so you can stop within the distance you can see, dipped headlights on and in fog below 50 m visibility the rear fog light on; never replace dipped headlights by front fog lights alone. Trap: candidates switch on the rear fog light in light rain, which dazzles.

Often confused with

• Warning for risk of ice or snow J36 — Ice or snow: slipperiness, not visibility.
• Warning for a slippery road J20 — Slippery road.
• Warning: a danger not indicated by another sign. J37 — Other danger.