Bus transport in Warsaw was introduced in 1920. Since 1994, services have been managed by Zarząd Transportu Miejskiego w Warszawie (ZTM Warszawa), and operated by under contract. ZTM's fleet consists of 1787 vehicles, which cover 288 lines. In 1921, three lines were opened. From November 1939 the regular liquidation of the rolling stock began, only one car survived the war. Bus transport appeared again in April 1945. The first night bus appeared on the streets of Warsaw in 1963. On March 11, 1994, the Warsaw transport was reorganized.