Falling rocks

Where you'll see it

Especially in mountainous areas

What it means

To warn that rocks could fall on the carriageway from the left (W334, TW334) or from the right-hand side (W335, TW335)

What you must do

Slow down to be able to stop within their sight distance if a fall occurs or has occurred. Such falls occur more often when it rains and therefore reduce your speed further since your stopping distance during rainy weather will be longer

Source: Signs manual W334, TW334, W335, TW335