Start a new game and get to the OG Loc missions. At the beach mission, talk to the DJ and respond positively. When she says lets dance, instead of talking to her again just run away and there will be no cars on the road. Save game, so you can do this whenever you wantSome fun things to do with this glitch are to turn on "all people hate you" cheat for zombie style survival horror game, or turn up the wanted level for fastest police chases ever.