What should be marked on the grid map in the airport/community emergency plan for accident site accessibility?

Marking primary and alternate routes on the grid map is crucial for ensuring that emergency responders can access an accident site efficiently and without delay. These routes facilitate quicker response times, which can be critical in emergency situations where every second counts. By having clearly identified pathways, emergency personnel and equipment can navigate the airport and surrounding areas more effectively, avoiding obstacles and congestion that could impede their arrival.

Furthermore, primary routes should be the most direct and quickest paths to the accident site, while alternate routes provide backup options should the primary routes be obstructed due to the incident itself or other factors like traffic or debris. This dual-route system significantly enhances the preparedness of the emergency response plan.

Unlike the other choices, which may be important for overall airport operations, they do not directly contribute to the immediate accessibility of an accident site. For instance, parking locations primarily serve the needs of passengers and personnel, restroom facilities are necessary for comfort but irrelevant in an emergency context, and fuel storage areas are more about hazard management rather than direct access during an emergency. Hence, marking primary and alternate routes is fundamentally important for effective emergency response at an airport.