What is NOT a type of line that vehicles must avoid driving over?

The correct answer identifies taxiway lines as not being a type of line that vehicles must specifically avoid driving over. Taxiway lines are essential for air traffic management on airside operations, providing guidance for aircraft movement. Vehicles are generally permitted to cross these lines when necessary, especially in areas designated for vehicle operations.

In contrast, cables, passenger walkway lines, and safety lines play crucial roles in ensuring safety and guided movement in the airport environment. Cables can pose a risk of damage to both vehicles and airline operations, while passenger walkway lines clearly demarcate areas where pedestrians should walk, keeping them safe from vehicular traffic. Safety lines are also critical as they often outline hazardous areas or zones that vehicles should not enter. Thus, recognizing the operational importance of these lines helps maintain safety and efficiency on the airside.