Coronation Drive developed as the major transport route for the western suburbs along with Milton Road . A landslide caused by flood waters in 1974 closed Coronation Drive due to cracking and subsidance . The flood caused the redirection of Coronation Drive so that traffic inbound to Brisbane City turned left at the Sylvan Road intersection , and then right down Land Street . In 2004 Coronation Drive was completely redeveloped into its current day form , with the redirection removed and widening to allow 6 lanes of traffic . Former Lord Mayor Jim Soorley inaugurated a series of " tidal flow " traffic lights in both directions , as well as a dedicated bus lane , in order to ease congestion along the road . Upon the election of Campbell Newman , the bus lanes were changed to T3 Transit Lanes with three occupants required . In March 2007 the T3 transit lane restrictions were removed after Campbell Newman requested the change based on analysis showing that only 5 % of vehicles actually use the T3 lane . The Labor opposition did not block the change
flood waters
1974 Brisbane flood
Coronation Drive, Brisbane