What Changes Occur in Nighttime Visibility Distance?

[McSimon]

Nighttime visibility distance becomes shorter. Here are the relevant explanations: 1. Reason for reduced visibility distance: At night, while driving on the road, due to the effect of headlights, bright objects are seen against a dark background, making them appear larger. However, the eyes still judge distance based on the perception that closer objects appear larger, resulting in reduced visibility distance. 2. Field of vision: Motor vehicle drivers can only clearly see objects illuminated by the headlights. The high beam of a car typically illuminates up to about 150m, while the low beam covers about 30m, with the illumination generally not extending beyond the road surface. Objects beyond this distance and range cannot be seen clearly.