Which statement describes the difference between capacity and Level of Service (LOS)?

Which statement describes the difference between capacity and Level of Service (LOS)?

• A. Capacity is the maximum throughput; LOS is a qualitative measure of performance at a given demand
• B. Capacity is qualitative; LOS is numeric
• C. They measure the same thing
• D. They are both qualitative

Answer: (A)

Capacity is the maximum throughput a roadway can carry under a defined set of conditions, usually expressed as vehicles per hour. Level of Service is a qualitative assessment of how the roadway performs for users at the actual demand, describing conditions like speed, comfort, and delays with categories (A to F). They’re related but not the same: capacity is the limit the road can handle, while LOS describes how well the road operates given the current demand relative to that limit. When demand is well below capacity, LOS is good; as demand nears capacity, delays rise and LOS deteriorates, potentially becoming poor or unacceptable when demand exceeds capacity.

Capacity is the maximum throughput a roadway can carry under a defined set of conditions, usually expressed as vehicles per hour. Level of Service is a qualitative assessment of how the roadway performs for users at the actual demand, describing conditions like speed, comfort, and delays with categories (A to F). They’re related but not the same: capacity is the limit the road can handle, while LOS describes how well the road operates given the current demand relative to that limit. When demand is well below capacity, LOS is good; as demand nears capacity, delays rise and LOS deteriorates, potentially becoming poor or unacceptable when demand exceeds capacity.