For calculation of headway, what is meant by one headway?

One headway is defined as the time interval between the arrival of two successive trains at a specific point on the railway track. This measurement is crucial for determining the frequency of train service and managing train schedules effectively. A shorter headway allows for more trains to operate within a given time period, increasing service frequency and providing better accessibility for passengers.

In transit operations, maintaining an optimal headway is vital for efficient operations and safety, helping to ensure that trains do not crowd each other on the tracks. This concept is essential for train operators as it directly impacts operational efficiency, passenger satisfaction, and overall service reliability.

The other options do not accurately relate to the concept of headway: distance traveled pertains to train movement, passenger count deals with capacity but not timing, and train length refers to the physical size of the train, none of which contribute to understanding the frequency of train arrivals.