How far must headlamps be visible in normal sunlight?

In Indiana, as well as in many other jurisdictions, the law requires that headlamps be visible from a distance of at least 500 feet when illuminated in normal sunlight conditions. However, the question specifically pertains to how far they must be visible in normal sunlight conditions.

The answer of 100 feet signifies the minimum visibility range needed for safety purposes during daytime driving. This distance ensures that other drivers have adequate warning or notice of your vehicle’s presence, particularly in situations where visibility may be hindered. This requirement is crucial for preventing accidents, especially on busy roads or in environments where vehicles might merge or cross paths.

While the distance for night visibility typically extends to a greater range, the emphasis during daylight driving focuses on maintaining a standard threshold of visibility without requiring the full extent mandated for nighttime use. Thus, the correct choice of 100 feet reflects the balance between safety concerns and practical visibility under normal sunlight conditions, ensuring that vehicles remain detectable to others on the road.