Roadway delays per vehicle between 15 and 25 seconds would have which Level of Service?

Level of Service (LOS) is a qualitative measure used in transportation planning to assess the operational conditions of a roadway. It ranges from A to F, with A representing the best conditions and F indicating the worst. Roadway delays per vehicle between 15 and 25 seconds typically fall within the criteria for Level of Service C.

Under LOS C, drivers experience stable flow, but the ability to maneuver within the traffic stream is more restricted than at LOS A or B. At this level, traffic is still moving efficiently, but users may encounter noticeable delays during peak periods. The thresholds for LOS C generally suggest that average delays per vehicle are tolerable to most roadway users, which aligns with the specified range of 15 to 25 seconds.

Levels of Service A and B indicate even better flow conditions, where delays are minimal, causing a lower chance of congestion. Level D represents a point just before significant congestion occurs, where delays are generally longer and less acceptable than at LOS C. Level E suggests a state of significant congestion, where delays are often longer than 35 seconds per vehicle.