How is runway numbering typically determined?

Runway numbering is determined by taking the nearest compass bearing of the runway's heading and rounding it to the nearest ten degrees. This system ensures that each runway has a unique number that corresponds with its direction, allowing pilots to easily identify the runway they are approaching or departing. For example, a runway aligned with a compass heading of 250 degrees would be numbered as runway 25, while a runway with a heading of 80 degrees would be designated as runway 08.

This approach is particularly important for navigation and safety, as it aids in maintaining situational awareness for both pilots and air traffic control. The unique numbering allows for quick identification and communication, essential in maintaining efficiency and safety in busy airport environments. Other options, such as runway length, area altitude, or traffic volume, do not factor into the numbering system, making them unsuitable explanations for how runways are designated.