What is the primary use of the left lane on a multi-lane road?

The primary use of the left lane on a multi-lane road is to allow drivers to pass other vehicles when traffic permits. In many areas, this lane is often referred to as the "passing lane" or "fast lane," and it is designated for use by those who wish to overtake slower vehicles in the right lanes. This usage helps maintain a smoother flow of traffic, ensuring that faster-moving vehicles can safely and effectively navigate around slower traffic.

Using the left lane for passing promotes safer driving conditions and helps prevent bottlenecks that can occur when slower vehicles remain in this lane. The expectation is for drivers to return to the right lanes after completing their maneuvers, thereby maintaining an orderly and efficient traffic pattern.

The other options suggest uses for the left lane that would not align with its intended purpose. Making right turns, beginning or ending left turns, or parking safely are typically activities that should occur in designated areas and lanes that do not obstruct the flow of traffic in the left passing lane.