The best way to get to Summerfest is to take the bus. MCTS has Freeway Flyer routes running to the festival grounds from the park and ride lots all day. The buses run every half-hour during the day, and after 5pm the schedule changes to every quarter hour. $6 gets you a round trip adult ticket. If you are already downtown, consider hopping on the shuttle. The shuttles run east and west along Wisconsin Avenue. Be sure to look for the detour route for shuttles in 2012, as the Wisconsin Avenue bridge will be closed during the summer months.