Main routes generally still existed in 1976.
Bangor & Aroostook Railroad Co. - operated 1936-present
Original route: Bangor-Fort Kent
After 1984 was Cyr Bus Line
Cyr Bus Line remains in existence
Brunswick Transportation Co. - operated 1959-1979
Original route: Portland-Berlin
(acquired from Greyhound)
1959-1964 was Maine Transit Corp.
Bus companies generally listed in the July 1942 Russell's Guide or the 1952 Mass Transportation's Directory, and their predecessor and successor companies. This list is somewhat arbitrary and provides a general overview.
The Blue Line - operated until 1980
Original route: Lewiston-Livermore-Rumford/Farmington
Hasey's Maine Stages - operated until 1949 (to Bangor & Aroostook Railroad Co./above)
Original route: Bangor-Rockwood