Ok so i made this decent city with a superb grid layout with good avenue placement but i keep having this wierd problem. in this one section of my city the avenues medians kepping flipping through all the median types at random times. you no how the avenues median type it based on the zones that surround it( dirt for farms and sometimes it has little trees or lamps ect). its quite annoying because everytime the avenues spazz out it laggs my game horribly. does anyone else have this problem?