When must you switch high-beam lights to low-beam lights?
Show the correct answer
Correct answer
A. When another car approaches from the opposite direction.
Explanation
You must switch from main beam to dipped headlights when another vehicle is coming from the opposite direction - answer A. Neither rain (B) nor entering a built-up area (C) creates such an obligation by itself; what matters is whether you could dazzle someone.
The Road Traffic Act allows you to use main beam from dusk to dawn on unlit roads, as long as it does not dazzle other drivers or pedestrians walking in a column, and requires you to switch to dipped headlights when a vehicle is approaching from the opposite direction - and if one of the drivers has switched off main beam, the other must do the same - and also when approaching a vehicle in front if its driver may be dazzled, and when approaching a rail vehicle or a water vehicle. A dazzled driver sees nothing for a few seconds, which is why you switch back to main beam only after you have passed the oncoming car.
Legal basis: Art. 51 para. 3 point 1 of the Road Traffic Act (Prawo o ruchu drogowym)