Overview
- The national meteorological service KNMI has placed almost the entire country under a code yellow warning for dense mist that formed overnight and moved across provinces including Utrecht.
- Reports show visibility in many locations falling to around or below 200 metres, a level that can significantly hinder driver sight and road safety.
- Forecasters and regional media say the mist will persist through the night and into the Friday morning peak, with conditions expected to gradually improve toward the end of the morning.
- Authorities advise motorists to switch on front fog lamps in low visibility but to avoid rear fog lights unless sight drops under 50 metres because rear fog lights can dazzle or confuse other road users.
- Practical effects include slower traffic, longer travel times and a higher accident risk during the morning commute, and meteorologists warn similar dense mist could form again overnight with falling temperatures and a chance of ground frost later in the week.