Getting To and Fro at bauma
As anyone that has ever attended a bauma understands very quickly, a lot of people are generally moving in the same direction, all at the same time. The various rail options, both U-bahn and S-bahn, as well as airport buses are the best bets for those not driving to the show grounds.
No matter what path you choose, getting to the show and especially getting back from the show (most notably at 5:00 to 6:30 pm) can be a real challenge.
The organizers have produced a flyer setting out transportation options. Download it at: http://www.bauma.de/en/anreise/anreise_1.php.