What does it indicate when the illumination distance of motor vehicle lights changes from near to far at night?

[SanQuinn]

When the illumination distance of motor vehicle lights changes from near to far at night, it may indicate that the vehicle is entering a downhill slope. Here are some precautions for driving at night: 1. Reduce speed: Visibility is poorer at night than during the day, so drive slowly and maintain an appropriate speed. 2. Use high and low beams correctly: Use low beams during normal driving to avoid inconveniencing oncoming vehicles. Use high beams when turning or going uphill to signal oncoming traffic. 3. Maintain a safe distance from the vehicle ahead: Poor visibility and slower reaction times at night increase the risk of rear-end collisions if following too closely, so keep an appropriate distance. 4. Use the horn: Be alert for pedestrians crossing the road at night. Observe carefully and use the horn or flash lights to warn them in advance. 5. Avoid unnecessary overtaking: Overtaking at night should be done cautiously, ensuring a straight-line distance from the vehicle ahead. Avoid overtaking on curves. Before overtaking, approach the vehicle ahead and use light signals to prompt it to slow down and yield. Only accelerate when the other vehicle has clearly yielded.