The C1-class trams are three-section Alstom Citadis 202 trams built in La Rochelle, France that operate on the Melbourne tram network. They were the first low-floor trams in Melbourne, being delivered in 2001/02. They are designated as "C1"-class trams, to differentate them from the C2-class trams and the original (1913) C-class Melbourne trams. To meet a franchise commitment to introduce new trams to replace Z-class trams, 36 three-section Alstom Citadis 202 low-floor trams were purchased by Yarra Trams. They were the first low-floor trams in Melbourne, and the first tram imported for the Melbourne tram system since the 1920s.