Trams of Australia
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When the Melbourne and Metropolitan Tramways Board took over the operations of the various municipal tramways authorities, it classified cars 1 to 10 of the North Melbourne Electric Tramway and Lighting Co. (NMETL) as U-class and cars 11 to 15 as V-class. The U class was an enclosed saloon tram while the V was an open toastrack design. The U would have been bearable in winter (unless you were the driver, who was outside), unlike the V, which would have been horrible for everybody.