Elizabeth That Was Presents: Adelaide 1989 (Introducing the O-Bahn) 

Official Introduction to the Adelaide O-Bahn by the South Australian Passenger Transport Board c.1989. The O-Bahn Busway is a guided busway that is part of the bus rapid transit system servicing the northeastern suburbs of Adelaide, South Australia. The O-Bahn system was conceived by Daimler-Benz to enable buses to avoid traffic congestion by sharing tram tunnels in the German city of Essen. Adelaide's O-Bahn was introduced in 1986 to service the city's rapidly expanding north-eastern suburbs, replacing an earlier plan for a tramway extension. The O-Bahn provides specially built track, combining elements of both bus and rail systems. Adelaide's track is 12 kilometres (7.5 mi) long and includes three interchanges at Klemzig, Paradise and Tea Tree Plaza. Interchanges allow buses to enter and exit the busway and to continue on suburban routes, avoiding the need for passengers to transfer to another bus to continue their journey. Buses can travel at a maximum speed of 100 km/h (60 mph), but are now restricted to 85 km/h (53 mph). As of 2015, the busway carries approximately 31,000 people per weekday. An additional section including a 670-metre (2,200 ft) tunnel opened in 2017 at the city end to reduce the number of congested intersections buses must traverse to enter the Adelaide city centre. The development of the O-Bahn busway led to the development of the Torrens Linear Park from a run-down urban drain into an attractive public open space. It has also triggered urban development around the north-eastern terminus at Modbury.
Stage 1 opened on 9 March 1986. Stage 2 opened on 20 August 1989. The O-Bahn had more than 4 million passenger trips in the year after completion of Stage 1 in 1986, with a 30% increase the following year. When the completed O-Bahn was opened on 20 August 1989, passenger numbers rose another 17%. The Adelaide public transport system was privatised in the 1990s and overall patronage across all systems (bus, rail and tram) dropped 25%. The exception to this was the O-Bahn with no decrease, and there were 19,500 passenger trips daily in 1996 (7.13 million a year). As of 2015, the busway carries approximately 31,000 people per weekday.