Headlights must be capable of being dipped to which direction?

Headlights must be capable of being dipped to the left to avoid blinding oncoming drivers. Dipping the headlights to the left directs the beam away from the eyes of drivers traveling in the opposite direction, thereby enhancing safety for all road users. This is especially important when driving at night or in poorly lit areas, as proper headlight alignment helps maintain visibility while preventing glare that could impair the vision of other drivers.

While headlights can also have adjustments for other angles or positions, the specific requirement of dipping to the left addresses the significant safety concern of ensuring that oncoming traffic is not affected by intense light, which could lead to dangerous situations on the road.