Lyric discussion by ryfall101 

Cover art for State Trooper lyrics by Bruce Springsteen

My take on it- It's about a mysterious, dark figure that's just riding along the NJ turnpike. We know he's done something bad but we don't know what it is ("but I got a clear conscience 'Bout the things that I done") and he fears that if he is pulled over by the State Trooper, he will either kill him, or be arrested for whatever he has done, or something like that.