Vehicles shall not be parked in areas identified by paint markings indicating what?

The correct choice reflects that vehicles shall not be parked in areas identified by paint markings indicating the travel of the bridge. Parking in these marked areas is prohibited primarily for safety and operational reasons. These markings are designed to ensure that pathways remain clear for the movement of transport and equipment, specifically in locations where raised structures like bridges can impact vehicle navigation and safety.

Ensuring these areas are unobstructed is crucial for avoiding potential hazards, ensuring that traffic can flow smoothly, and allowing emergency response vehicles to access any incidents quickly without delay.

The other options involve areas that are significant in their own right - such as passenger terminals and spaces marked for authorized personnel - but they do not address the specific critical safety concerns relating to the designated travel paths of bridges which could pose a risk if not kept clear. Thus, the emphasis on bridge travel marking is vital for maintaining safety standards and operational integrity in airside vehicle movements.