Horse Car
1887-1896 - Phoenix Street Railway Co.
1893-1895 - horse cars replaced with electric streetcars
1896-1900 - Phoenix City Railway Co.
1900-1925 - Phoenix Railway Co.
1925-1958 - Phoenix Street Railway (city owned)
1941 - buses introduced
1948 - streetcars discontinued
1958-1971 - Valley Transit Lines (privately owned)
1971-1993 - Phoenix Transit System
CURRENT TRANSIT SYSTEM (SINCE 1993)
Valley Metro
Horse Car
1893-1906 - several companies
1906-1967 - Tucson Rapid Transit Co.
1930 - streetcars replaced with buses
1967-1969 - Tucson Transit Corp. (American Transit Corp.)
CURRENT TRANSIT SYSTEM (SINCE 1969)
Sun Tran
1908-1928 - Warren-Bisbee Railway Co.
1928 - streetcars replaced with buses operated by affiliated company
1928-1940's - Warren-Bisbee Bus Line
Douglas
Steam Dummy
1903-1912 - Douglas Street Railway Co.
1906 - steam dummy replaced with electric streetcars
1912-1920 - Douglas Traction & Light Co.
1920 - streetcars discontinued
Period of no transit service
Private bus co. in 1952 - Valley Transportation Co.
Prescott
1904-1915 - Prescott & Mount Union Railway Co.
1915 - streetcars discontinued
Period of no transit service
Private bus co. in 1952 - Prescott Transit
Yuma
Private bus co. in 1952 - Yuma Bus Co.