Definitions for "Level of Service"
A set of qualitative descriptions of a transportation system's performance. The Highway Capacity Manual defines levels of service for intersection and highway operations, with ratings that range from A (best) to F (worst).
LOS is a rating of the effectiveness of a highway in serving traffic. Level of Service is measured on a scale from A to F with "A" categorizing free flowing traffic and "E" and "F" categorizing congested conditions. LOS is determined based in part on the ratio of the peak hour/peak direction traffic volume on a road and the hourly traffic capacity of the road. LOS F indicates that peak hour traffic volumes are greater than the capacity of the road. For example, if the northbound lanes of road have the ability to carry 10,000 vehicles per hour (its capacity), then any hourly traffic volume of 10,000 vehicles or greater would operate at LOS F and drivers would experience high levels of congestion.
A transportation-related term that describes the operating conditions a driver will experience while traveling on a particular street of highway.
Amount of fire prevention and fire suppression supplied; may be expressed several ways (e.g., percent of people or buildings protected, area protected, dollar value of property protected, firefighters per capita, water flow capability).