What hazard indicators should drivers remain alert for near operational aircraft?

Drivers should remain alert for operational anti-collision lighting and/or landing gear lighting near operational aircraft because these indicators are crucial for safety in an airfield environment. Anti-collision lights are designed to enhance the visibility of aircraft to prevent accidents, particularly in areas where the aircraft are in operation. These lights signal to drivers that the aircraft is powered on and potentially moving, which necessitates heightened awareness and caution.

Landing gear lighting serves a similar function, indicating the readiness of the aircraft to take off or land. Recognizing these lights helps drivers anticipate the actions of the aircraft and take the necessary precautions when navigating around them, ensuring that they maintain a safe distance and avoid any accidents.

While turn signals, sound alarms, and parking cones provide useful information regarding vehicle movements and safety, they are not specifically related to the operational status of the aircraft. Thus, the most relevant indicators for awareness around aircraft operations are the anti-collision and landing gear lights.