Under what condition is passing on the right allowed while driving?

Passing on the right is permitted primarily when the vehicle ahead is making a left turn and there is enough space to maneuver safely. This situation often occurs when the road is wide enough or there is a designated lane for such actions. It ensures that the driver can make the pass without conflicting with the left-turning vehicle, thus promoting safer driving practices and maintaining the flow of traffic.

In many other scenarios, such as a construction zone, or under conditions of excessive speed, passing on the right may not be safe or legal. On roads with multiple lanes, while there may be opportunities to pass on the right, the specific condition of a vehicle in front turning left is the primary context where this maneuver is explicitly allowed to promote safety and order on the road.