The State Transport Authority (STA)
was the government agency which controlled public transport within the State of South Australia
between 1974 and 1994.
The STA was established by the State Transport Authority Act 1974
, which aimed to provide an integrated and coordinated system of public transport within South Australia. This was to be achieved by assuming direct control of state-operated services (particularly in the Adelaide
metropolitan area) and by exercising regulatory control of privately operated services.
The STA was dissolved (and the 1974 Act repealed) as a consequence of the These reforms split the STA into the Passenger Transport Board
, which coordinated and funded the public transport system, and TransAdelaide
, which actually operated metropolitan buses, trains and trams. The formation of TransAdelaide was a prelude to competitive tendering and the introduction of private operators into the Adelaide public transport network.
In the period following its establishment on 18 April 1974, the State Transport Authority took over the functions of three government agencies. These were initially structured as three independent Divisions of the STA: