What must you anticipate with this road sign?

You answered correctly by choosing all three options. This road sign warns that you are near an airport or an airfield, where sudden noise from airplanes can startle drivers or pedestrians. Because of the noise and distraction, other road users may become inattentive or distracted. Vehicles might also brake suddenly in response to unexpected situations caused by this distraction or by vehicles entering or exiting airport areas. Therefore, you should stay alert, be prepared for sudden braking by other vehicles, and drive cautiously. This ensures safety for everyone near the airport environment.