Correct answer
Adjusting and aiming the beam of light projected by the headlights, both vertically and horizontally.
Vehicle lighting devices must be adjusted, both vertically and horizontally, so that they provide safe, effective illumination without dazzling or inconveniencing other road users. We adjust the headlights by aiming the beam of light they project.
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Checking that the headlights are aimed as low as possible.
Adjusting and aiming the beam of light projected by the headlights, both vertically and horizontally.
Regularly checking the width of each headlight.
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