How is headlight height measured?

The measurement of headlight height is critical for ensuring that headlights are properly aimed to provide adequate visibility and avoid blinding other drivers. The correct method for measuring headlight height involves determining the distance from the center of the headlamp to the road surface. This measurement ensures that headlights are positioned at the correct height for optimal performance.

When headlights are too high, they can cause glare for oncoming traffic, while headlights that are too low may not adequately illuminate the road ahead. Therefore, measuring from the center of the headlamp to the road surface is essential to maintain safety on the road. This method allows for a standardized and effective measurement that adheres to safety regulations.

In contrast, other options provide measurements that do not directly address the intended function of headlight aiming, such as measuring to the hood or bumper, which do not ensure proper alignment with the road.