What must vehicle operators do when preparing to cross taxiways at O'Hare?

When preparing to cross taxiways at O'Hare, vehicle operators are required to yield to any vehicles already crossing taxiways. This is essential for maintaining safety and efficient operations within the airport environment, where multiple aircraft and vehicles are in motion simultaneously. Yielding ensures that there is no obstruction or collision as one vehicle enters the taxiway, allowing for a smoother flow of traffic.

In addition to yielding, vehicle operators must also be vigilant about their surroundings, observing any signs or markings that give direction or specific instructions related to taxiway crossings. While waiting for ATCT clearance may be necessary at times, the primary responsibility is to yield to traffic, which is critical in an area with potential congestion and various operational activities.