When passing another vehicle, when should a driver return to the right lane?

Returning to the right lane after passing another vehicle should be done as soon as possible without impeding the vehicle being passed. This ensures that the passing maneuver is completed efficiently while still being considerate of other drivers on the road. It is important for safety and traffic flow to re-enter the right lane promptly, but not at the expense of disrupting the speed or path of the vehicle that is being overtaken.

This approach promotes a smoother driving experience for everyone on the road and helps to minimize the time spent in the left (or passing) lane, which is generally reserved for overtaking slower vehicles. Monitoring the position and speed of the vehicle you’ve just passed is crucial; once you can determine it is safe to move back to the right lane without causing the other vehicle to brake or change its speed, that is the ideal time to do so.