 The Melbourne trams network is the largest in the world, and most lines from the suburbs run down one of the streets of the CBD, with Swanston Street hosting of six lines, making it one of the busiest tram corridors in the world.Trams also run along Flinders, Collins, Bourke, La Trobe, Spencer, Market, Elizabeth, and Spring Streets.In recent years nearly all CBD tram stops have been rebuilt as larger all-accessibility "superstops".