Which statement about Controlled Taxiways is true?

The correct statement is that only some taxiways are controlled. Controlled taxiways are designated paths on an airfield where operations are managed to ensure safety and efficiency. Its control is typically enforced in busy airport environments or areas close to active runways to direct aircraft movements and reduce the risk of collisions or incidents.

Understanding that not all taxiways are controlled helps clarify the operational flexibility airports can have; some taxiways may remain unregulated during normal operations, especially in less busy areas. This capability allows for efficient handling of ground traffic while maintaining adequate safety protocols in more critical areas.

The other statements do not reflect the operational reality of taxiway management. Taxiways are not universally controlled at all times; the level of control can vary depending on the specific airport layout and traffic conditions. Controlled taxiways are not exclusively for emergencies; they are a regular part of the airfield's operations. Finally, the assertion that taxiways require no control during regular operations is inaccurate, as controlled environments are essential for proper air traffic management, especially in high-traffic settings.