Who build the transportation commonly used on Melbourne's traditional main street?
Y1-class Melbourne tram: The Y1-class was a class of four trams built by the Melbourne & Metropolitan Tramways Board built as a modified version of the Y-class to trial one man operation. Collins Street, Melbourne:  Collins Street has served as Melbourne's traditional main street since 1837 and was laid out as a core feature of the Hoddle Grid.
i don't know