You have your high beams on and another vehicle approaches. What is the minimum distance at which you must switch your high beams to headlights?

In the United States, the law generally states that a driver must switch from high beams to low beams when an oncoming vehicle is within 500 feet. Here are the steps:

1. Identify the oncoming vehicle: This could be a car, truck, motorcycle, or even a bicycle. Any vehicle with a headlight counts.

2. Estimate the distance: Judging distance at night can be difficult. As a rule of thumb, if the oncoming vehicle's headlights are bright enough to cause discomfort to your eyes, it's probably time to switch your beams.

3. Switch your beams: To switch from high beams to low beams, you usually have to pull or push the turn signal lever. In some cars, there's a separate lever for this.

4. Keep your low beams on: Keep your low beams on until the oncoming vehicle has passed.

Remember, the goal is to avoid blinding the other driver while still maintaining enough light to see the road ahead.