Index | A | B | C | D | E | F | G | H | I | K | L | M | N | O | P | R | S | T | U | V | W | Y | Z(countable noun) Usage note: This is the usual term used by all speakers. A concrete track designed to let buses travel quickly between major points in a town. Buses are specially adapted to use the O-Bahn and are guided automatically along the concrete track. Other traffic is not allowed to use the O-Bahn. Example: What surprised me was the "O-Bahn" system, originally from Germany. There are small wheels on the sides of an ordinary shuttle bus, which allow it to move onto a special track. Once on the track, the driver does not have to operate the steering wheel. (http://nobuteru.or.jp/english/topics/topics_02.html)An O-Bahn bus on the track in Adelaide(photo by Julia Miller)