Which factor affects terminal planning, especially regarding peak flight schedules?

The factor that significantly affects terminal planning, particularly in relation to peak flight schedules, is peak hour vehicle volumes. This aspect is crucial because peak hour vehicle volumes inform how many passengers are arriving and departing at the terminal during the busiest times. High vehicle volumes can lead to congested roadways, which impact the timely movement of passengers to and from the terminal. Understanding peak hours helps airport planners ensure that the terminal facilities—such as check-in, security, and boarding—are adequately prepared to handle the influx of passengers efficiently. This planning ensures a smoother travel experience and optimizes the flow of operations around the critical times when flights are taking off and landing. Efficient vehicle movement is essential in managing overall airport operations, directly influencing how well a terminal can service its peak schedule.