Metro Trains Melbourne, known colloquially as simply 'Metro', is the franchise operator of the suburban railway network of Melbourne, Australia. Metro Trains Melbourne is a joint venture between the Hong Kong-based MTR Corporation (60%), John Holland Group (20%) and UGL Rail (20%).Metro Trains Melbourne operates a fleet of 407 three-car train sets on 837 kilometres of track. There are sixteen regular service train lines and one special events train line.