The Metropolitan Adelaide Transport Study, or "MATS Plan" as it became known, was a comprehensive transport plan released in 1968 proposing a number of road and rail transport projects for the metropolitan area of Adelaide, South Australia.
It recommended the construction of 98 kilometres (61 miles) of freeways, 34 kilometres (21 miles) 34 kilometres of expressway and the widening of 386 kilometres (240 miles) of existing arterial roads. It also featured new arterial roads and a new bridge over the Port River. For public transport, it proposed the closure of the Glenelg tram line, 20 rail grade separations and 14 kilometres (8.7 miles) of new railway line, including a subway under King William Street.[1]
The estimated cost of land acquisition and construction was $436.5 million in 1968, which equates to approximately $4,580 million in 2010 with inflation.[2] Very few of the plan's recommendations were ultimately brought to fruition in their original form due to political and public opposition.[1]