The script will make a toll at the intersection of Los Santos and the suburbs of San Fierro. When approaching a checkpoint, you need to slow down and drive up to a man in a blue cap, he will take $ 1000 from you, after which you can safely drive on. And if you do not want to pay and slip through at speed, then they will give you three wanted stars, so it's better to pay the fare than to run away from the cops later.