The Metropolitan Transit Authority (MTA), known to the general public as The Met, was a Government of Victoria owned corporate body that operated suburban passenger trains, trams and buses in Victoria, Australia. It was set up under Section 15 of the Transport Act 1983 and commenced operation on 1 July 1983. It was a statutory body set up to manage the trams and buses formerly operated by the Melbourne & Metropolitan Tramways Board, the metropolitan train operations of the former VicRail, and the operations of the former Melbourne Underground Rail Loop Authority.

The Melbourne tramway network is a tramway system serving the city of Melbourne, Victoria, Australia. The tramway network is centred around the Melbourne central business district (CBD) and consists of approximately 1,700 tram stops across 24 routes. It is the largest operational urban tram network in the world and one of the most used, with more than 500 trams and 250 kilometres of double tram track. It served a patronage of 206 million over the year 2017-2018. Trams are the second most utilised form of public transport in Melbourne after the city's metropolitan commuter railway network.