Which of the following actions is a violation of airside vehicle operation rules?

Obstructing aircraft operations is indeed a violation of airside vehicle operation rules because it poses significant safety risks for aircraft and passengers. On the airside, where aircraft are moving and taxiing, maintaining clear paths is critical to prevent accidents and ensure efficient operations. Any action that disrupts or obstructs the flow of aircraft can lead to dangerous situations, including potential collisions or delays in flight schedules.

In contrast, the other options represent actions that are in compliance with airside regulations. Maintaining communication with air traffic control is essential for ensuring all vehicles are aware of aircraft movements and operational directives. Driving in marked lanes is a key safety practice that helps prevent vehicles from entering restricted or dangerous areas. Additionally, performing pre-trip vehicle checks is a standard procedure to ensure that vehicles are safe and operational, reducing the risk of mechanical failures while on the airside.