Color coded map shows intercity bus routes in existence in 1976.
Blue indicates Greyhound, red indicates Trailways. Additional colors indicate significant independent bus companies, and are identified with labels. Black indicates smaller independent companies.
Thin blue or red lines indicate routes which were once part of Greyhound or Trailways, but later transferred to independent bus companies.
Beginning in 1919, intrastate bus service in Arizona was regulated by the Arizona Corporation Commission.
Early Certificates of Convenience and Necessity
Bus companies listed in early Annual Reports of the Arizona Corporation Commission.
Obscure Interurban/Intercity Bus Companies
The most obscure bus companies, not listed in the Russell's Guide but mentioned in the 1952 Mass Transportation's Directory, or sometimes mentioned in the WPA Federal Writers Project/American Guide Series books.