Where are special vehicles spawned in gta v story mode?

In Grand Theft Auto V's single-player story mode, special vehicles do not automatically spawn at designated locations like in online mode. Instead, they are integrated into the narrative through missions, heists, or as rewards for completing certain objectives. For example, the Kuruma (armored car) becomes available after completing the 'Road to the Hellfire' mission, while the Buzzard attack helicopter can be requested during specific missions involving Trevor. Some vehicles, like the Luxor and Velvet, are accessible only through special event completions or as promotional rewards. The three protagonists' individual storylines also grant access to unique vehicles tied to their respective missions, such as Michael's garage housing various modified cars. Players must actively participate in missions or achieve specific milestones to gain access to these vehicles rather than finding them waiting at predetermined spawn points.