Aidan Stanger wrote...
That's interesting because the description matches that of an O-bahn.
Does this mean that the Adelaide O-bahn is no longer the only one in the
world?*

It hasn't been the only one for some time:
http://www.garden.force9.co.uk/OBahn.htm
http://www.busesintl.com/July_2002.htm
http://www.firstgroup.com/ukbus/yorkhumber/bradford/qualitybus/qualitybusindex.php
http://www.campaignon.com/caseforrail/Busway%20Proposal/default.aspx
--
Martin Clark