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. 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. Very few of the plan's recommendations were ultimately brought to fruition in their original form due to political and public opposition.