What Does the Change from Near to Far in Nighttime Lighting Indicate?

[McIris]

When the illumination distance of the headlights changes from near to far, the possible road conditions ahead are: a curve turning into a straight road, entering a downhill slope, a gentle downhill becoming a steep downhill, or transitioning from a downhill to a flat road. Methods for judging road and terrain conditions while driving with lights at night are as follows: 1. Uphill and Downhill: While driving, if you feel the vehicle speed automatically slowing down and the engine sound becoming muffled, it indicates an increase in driving resistance, meaning the car is going uphill or entering a difficult section. If you feel the vehicle speed automatically increasing and the engine sound becoming lighter, it indicates a decrease in driving resistance, meaning the car is going downhill. 2. Low Valley Sections: If you notice that the illumination distance of the headlights changes from far to near while driving, it indicates that the car is approaching an uphill section, a sharp curve, or is about to reach the low point of a rolling road.