its because you didn't get that far in the game to remove it. You need to complete a certain amount of missions to remove the barricade
yes he is with an advanced police car mode.
No there isn't.
No
You can't, its a mod.
You can't.
Walk through the door
You can't. You can be a good bystander though!
baracade
steal it from the nypd/new york police department on gta 4
No, you cannot be a police officer in GTA IV.
WHERE
Urban chaos:riot response for xbox and in GTA 4's xbox live multiplyaer there is a game mode where you are a police officer