When are you allowed to drive in the left lane of a multi-lane road?

Driving in the left lane of a multi-lane road is primarily designated for passing slower vehicles. This practice is rooted in the principle of maintaining an orderly flow of traffic, where the left lane is used for overtaking and moving faster than the vehicles in adjacent lanes. When you are driving in the left lane for the purpose of passing slower vehicles, it enables smoother travel and minimizes disruptions in the flow of traffic, as it encourages drivers to keep to the right lanes unless they need to make a move to the left for passing.

In many jurisdictions, it is considered a best practice and may even be mandated by law to allow faster-moving vehicles to pass on the left, improving safety and efficiency on the road.