Main routes generally still existed in 1976.
The Bee Line - operated 1952-1979
Original route: Lapeer to Pontiac and Caro
Prior to 1952 was Pontiac-Orion-Oxford-Lapeer Bus Co.
Mercury Bus Lines - operated 1946-1989
Original route: Muskegon-Big Rapids
Prior to 1949 was Decker Bus Line
1949-1954 was Wolverine Bus Co.
1980-1989 was Michigan Trailways
Mio Bus Line - operated 1945-1989
Original route: West Branch-Lewiston
1972-1980 was Delta Bus Co.
1980-1989 was Michigan Trailways
Smith Bus Line - operated until 1978
Original route: Alpena-Indian River
Valley Coach Lines - operated 1949-1989
Prior company: Russell Motorbus Lines (Flint-Flushing)
Prior company: Flint-Port Huron Bus Lines
Prior company: Flint-Caro-Sebewaing Bus Co.
1980-1989 was Michigan Trailways
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.
Allegan-Grand Rapids Bus Line - operated until 1951 (to North Star Lines/previous page)
Original route: Allegan-Grand Rapids
Balcer Bros. Motor Coach Co. - operated until 1945 (to Great Lakes Greyhound)
Original route: Bay City-East Tawas
Central Michigan Bus Line - operated until 1952 (to Wolverine Bus Co. later Mercury Bus Lines/above)
Original route: Grand Rapids-Alma-Saginaw
Copper Range Motor Bus Co. - operated 1928-1944
Affiliated with Copper Range Railroad
Original route: Painesdale-Houghton-Hancock-Lake Linden
Foster Bus Line - operated until 1945 (to Great Lakes Greyhound)
Original route: Lansing-Mt. Pleasant-Clare
Hill Bus Lines - operated until 1945 (to Indian Trails/previous page)
Original route: Bad Axe-Saginaw
Huron Shore Bus Line - operated until 1945 (to Great Lakes Greyhound)
Original route: Bay City-Alpena-Mackinaw City
Imlay City-Bad Axe Bus Line - operated until 1947
Original route: Imlay City-Bad Axe
Mackinac Motor Bus Co. - operated until 1944 (to Great Lakes Greyhound)
Original route: St. Ignace-Sault Ste. Marie
Northland Lines - operated until 1958
Original route: Sault Ste. Marie-Marquette
1944-1946 service suspended
Prior to 1944 was Superior Bus Line
Northwestern Motor Bus Co. - 1921-1954
Original route: Ironwood-Bessemer-Wakefield
Peoples Rapid Transit Corp. - operated 1935-1957
Operated various directions from Kalamazoo
Saginaw-Port Huron Bus Line - operated until 1952
Original route: Saginaw-Port Huron
Silver Star Bus Line - operated 1923-1959 (to Mercury Bus Lines/above)
Original route: Gladwin-Midland-Bay City
Prior to 1948 was Rogers Motor Lines
1959-1961 service suspended
Harry Smith's Bus Line - operated until 1950
Original route: Indian River-Petoskey-Harbor Springs/East Jordan
Yellow Bus Line - operated until 1948 (to Great Lakes Greyhound)
Original route: Saginaw-Midland-Mt. Pleasant