When passing another vehicle, how many headlights of the vehicle you're passing should you see before returning to your lane?

When passing another vehicle, it is important to ensure that you have safely cleared the vehicle before returning to your lane. Seeing two headlights of the vehicle you just passed indicates that you have fully moved ahead of the vehicle, allowing for a safe distance to re-enter your lane. This guideline helps prevent accidents caused by cutting in too early, as doing so without adequate clearance could lead to a collision.

The sight of two headlights being visible assures you that the other vehicle is now behind you, thus making it safe to merge back into your original lane. Ensuring this visibility contributes to safer driving practices and enhances awareness of your surroundings on the road.