Answer:
It is true that in case an evacuation is necessary and the main roads are blocked or crowded, having a local map will help navigate an escape route.
Explanation:
- A local map dispenses the information about the roads and tunnels ignored in a larger map, for the size and significance of these roads is not as much as that of the main roads.
- In a situation that demands a quick evacuation and if the main roads are blocked, taking help of a local map to find smaller roads to evacuate would be the best option left.