Recreational Vehicle parking?

i need to know if there is any regulations to Recreational Vehicle parking with in city limits.. because down the street from me a guy has parked an RV and it blocks the road so you cant see if anyone is coming down the road..i have almost gotten hit more than once. the police say there's nothing they can do because he is not breaking any laws. but there has to be some kinda of law stating that you cant park an RV with in city limits for so long. the RV has been there for over 3 months now. it needs to move before someone gets hurt. i need help on this. any information or websites that might help are greatly appreciateed.