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

Returning to the right lane after passing another vehicle should happen as soon as it is safe to do so without impeding the vehicle that has just been passed. The driver needs to ensure that there is enough space to move back to the right lane while maintaining safety for all vehicles involved. This approach promotes smooth traffic flow and minimizes the chances of causing disruptions or accidents.

Choosing an appropriate moment to return to the right lane is crucial; the driver should check the mirrors and ensure that the passed vehicle is not too close before making the lane change. Waiting until the vehicle is completely out of sight might be overly cautious and can disrupt traffic, especially on busy roads. Signaling is an important part of the process but should not be considered the sole condition for returning to the lane. Thus, the focus should be on safety and the preservation of traffic flow while returning to the right lane as soon as it's feasible.