Final answer:
Over-driving your headlights refers to driving at a speed that doesn't allow you to safely react to obstacles within the range illuminated by your car's headlights at night.
Step-by-step explanation:
Over-driving your headlights means driving at a speed faster than the light from your headlights allows you to see a reasonable change in your environment and react safely. When your vehicle is moving too quickly in the dark, the distance illuminated by your headlights is not sufficient for you to identify hazards and stop or maneuver safely within the lit area. One should always ensure that their driving speed allows them to have complete control over their vehicle and be able to respond to potential obstacles or changes in driving conditions. Factors such as the weather and road conditions should also be taken into consideration; they can significantly affect visibility and stopping distances. Therefore, driving at an appropriate speed that ensures you can safely react within the range of your headlights is essential for night-time driving safety.