Trams of Australia
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 V-class were Melbourne's toastrack tram and given that only 5 were built (as opposed to well over 100 times that number built in Sydney), and their short service history, it is clear how unpopular they were. They were a single truck design (no double-truck toastracks were operated in Melbourne).
Thanks to Andrew Cox, email@example.com, for some of the information here.