What does "ground control" refer to at O'Hare Airport?

"Ground control" at O'Hare Airport refers specifically to the air traffic control function responsible for managing all ground movements of aircraft on the taxiways and runways, as well as the movements of vehicles and personnel on the airport premises. This includes directing aircraft from the gate to the runway and vice versa, ensuring safe and efficient movement to prevent collisions and maintain orderly operations on the ground.

This function is crucial for the safety and efficiency of airport operations, as ground control coordinates the various activities occurring simultaneously, such as aircraft taxiing, maintenance, and baggage operations. By managing these movements, ground control helps to optimize traffic flow and reduce delays, making it essential for the overall functioning of the airport.

The other options address different areas of airport operations but do not pertain to the critical role of ground control. Traffic management of airport parking, shuttle bus services, and security operations each focus on specific aspects of airport functionality that are distinct from the responsibilities of ground control.