I got that achievement in the first few minutes of the game. I was escaping some cops and by some freak accident from a turn, I hit something and flipped over a rail and landed on the metro tracks. I then drove on them to get to the bridge underpass and got the 6 star wanted level and just sat in the covered metro tracks on the bridge for 5 minutes. Kapow. Achievement unlocked. I then proceeded to escape that same wanted level by blasting down the metro tracks since it's far less cluttered in traffic only a random train now and then.
Funny thing is, I ditched my car on the tracks and a train came along and hit it. The car ran my ass over killing me. That's a fitting end to a good start to a game.