What does LS stand for?

Level of Service

Level of Service (LOS) in transportation is a qualitative measure used to describe the operational conditions within a traffic stream, and their perception by motorists and passengers. It ranges from A (best) to F (worst), assessing factors like speed, travel time, freedom to maneuver, traffic interruptions, and comfort.

This metric is crucial for transportation planning and engineering, as it helps in evaluating the performance of roadways, intersections, and transit systems. By analyzing LOS, professionals can identify areas needing improvement, prioritize projects, and enhance the overall efficiency and safety of transportation networks.