What does "overdriving your headlights" mean?

"Overdriving your headlights" refers to driving at a speed that exceeds the distance illuminated by your headlights, which means you may not be able to stop in time to avoid a hazard that appears in your path. When driving at night, particularly under low visibility conditions, your headlights provide a limited range of visibility. If you're traveling faster than you can see, there's a risk of encountering unexpected obstacles or hazards, leading to potential accidents. Understanding this concept is crucial for safe nighttime driving, as it emphasizes the importance of adjusting your speed to ensure that you can react effectively within the distance your headlights allow. This principle helps in maintaining control and safety while driving after dark.