Sign 3.20 Priority signs Important for cat. B

Alternating flashing lights (level crossing)

Found at level crossings. When the red lights flash alternately, you must stop before the crossing – a train is approaching.

Legal reference: SSV art. 93, Road Signs Ordinance (SSV, SR 741.21)

Practise in the quiz Practise the full car theory (cat. B) – CHF 9.90