Which of the following is NOT an approved agency that may exceed established speed limits while performing official duties?

The answer identifies that the airfield sweeper is not an approved agency permitted to exceed established speed limits while performing official duties. In airport operations, agencies such as airfield maintenance, aircraft fueling, and emergency services are sometimes granted specific allowances for speed in order to promptly address tasks that are critical to safety and efficiency. For example, emergency services may need to respond quickly to an incident, and maintenance crews may need to move swiftly to conduct urgent repairs.

In contrast, the role of an airfield sweeper typically focuses on maintaining cleanliness and safety on the runways and taxiways rather than responding to emergencies or essential maintenance needs. Therefore, it does not necessitate exceeding speed limits and must adhere to established traffic regulations to ensure the safety of all personnel and equipment on the airfield. Keeping speeds at or below the established limits helps to minimize risks and maintain orderly operations, making it essential for non-emergency functions like sweeping to comply with these restrictions.