¿Por qué están cerrados los puentes al principio de un Grand Theft Auto?

In every Grand Theft Auto game, except for 5, there are limits to the map at the start of the story. Each GTA game has a section of the story where its bridges are closed. Recorded on PC. Open World R Games. Peninsula: A piece of land surrounded by water, connected to a larger landmass only by a relatively narrow strip. (RAE) A piece of land surrounded by water on all sides except for a narrow strip or isthmus that connects it to the mainland. (Wikipedia) Examples: The Yucatán Peninsula, the Baja California Peninsula, the Iberian Peninsula (Spain and Portugal), Italy, Portugal, Florida, Paraguaná, etc. Crossing to the other island in GTA 3:    • Como Cruzar a la Otra Isla en GTA 3 Sin Tr...   Crossing to the other island in GTA Vice City Stories:    • Cruzar a la Otra Isla en GTA Vice City Sto...