Capacity and Level of Service (LOS) are closely related and can be easily confused. To help clarify the difference between the two, imagine a phone booth that contains ten people. The phone booth obviously has a capacity of ten or more people, but its likely that the level of service (quality of service) would be unanimously unacceptable. Capacity is a measure of the demand that a highway can potentially service, while level of service (LOS) is a measure of the highways operating conditions under a given demand.
Traffic engineers use capacity and level of service analyses to:
Capacity and level of service (LOS) are fundamental concepts that are used repeatedly in professional practice. Because of their obvious importance, this chapter is designed to introduce the undergraduate engineering student to capacity and level of service (LOS).
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