What type of vehicle must yield the right-of-way to all aircraft in motion?

Ground motor vehicles must yield the right-of-way to all aircraft in motion because safety is a top priority at airports. This regulation is in place to prevent accidents and ensure that aircraft can operate smoothly during takeoff, landing, and taxiing. Ground vehicles, which include cars, trucks, and other non-aircraft vehicles, can pose a significant hazard if they do not yield appropriately, potentially causing disruptions in airport operations or collisions with aircraft.

While other types of vehicles like maintenance vehicles, passenger buses, and service cars also have specific rules regarding operating around aircraft, ground motor vehicles encompass a broader category that consistently must adhere to yielding to aircraft. This standard is critical to maintaining a safe environment on the airfield, where the movement of aircraft takes precedence over ground transport.