What areas should be avoided while driving on the airside?

The correct answer focuses on the critical safety protocols for airside operations. Active runways and taxiways are crucial zones in an airport environment, reserved for aircraft movements. These areas are densely trafficked by planes, and access to them is heavily regulated to ensure the safety of both aircraft and vehicle operators.

Driving onto runways or taxiways without proper authorization can pose significant risks, including collisions and other accidents. Thus, operators must adhere to strict guidelines and only enter these zones when explicitly permitted, typically as part of specific training or in emergency circumstances.

The other options, while important to consider, do not carry the same level of risk associated with unauthorized access to active runways and taxiways. Designated parking zones, areas with poor visibility, and general regulations around airside vehicle operations are relevant, but they don't match the critical nature of avoiding active runways unless authorized. Proper understanding and adherence to these regulations ensure a safer environment for both vehicles and aircraft.