What is the definition of Highway Capacity?

• A. The minimum traffic flow that can be accommodated in a highway facility in a given time period under existing roadway and control conditions
• B. The maximum traffic flow that can be accommodated in a highway facility in the future
• C. The minimum traffic flow that can be accommodated in a highway facility according to data from the previous year
• D. The maximum traffic flow that can be accommodated in a highway facility in a given time period under existing roadway and control conditions