A vehicle entering a conflict zone on the airside must:

Proceeding with caution and being aware of aircraft movements is essential when a vehicle enters a conflict zone on the airside. A conflict zone typically refers to areas where aircraft operations and vehicle movements intersect and potentially can create hazardous situations.

By approaching with caution, the operator can ensure they are watching for any approaching aircraft and are aware of their surroundings. This vigilance is crucial for maintaining safety, as aircraft may have the right of way and can maneuver unpredictably. Ensuring all movements are deliberate and careful minimizes the risk of an accident occurring in these busy areas.

The other choices do not prioritize safety adequately; accelerating could lead to a dangerous situation if an aircraft is present. Stopping completely may not always be necessary and could lead to confusion or create a hazard for others, particularly if it disrupts the flow of traffic. Ignoring other vehicles disregards common safety protocols, which require operators to be aware of and consider other users of the airside area. Hence, the emphasis on caution and awareness is critical in maintaining a safe working environment around aircraft operations.