Additional bus companies, listed as existing during additional years or decades, are mentioned in old City Directories, and in the WPA American Guide Series of state guidebooks.
Intercity Bus Line - connected Holland with Zeeland.
Lake Shore Line - suburban served Macatawa Park, Jension Park, Virginia Park, Central Park, Montello Park, Ottawa Beach, Waukazoo, Beachwood.
Jackson-Howell Bus Line - connected Jackson with Hudson MI and intermediate points.
Mauzy Bus Line - served Manistee to Filer City, also existed in 1928.
Petoskey-Harbor Springs Bus Line - existed in 1930's, possibly evolved to part of Harry Smith's Bus Line.
Canadian American Trailways - existed in 1930's.
Red Star Way Lines - existed in 1930's.
Bad Axe-Port Huron - existed in 1930's.
Bus companies operating over longer distances than the above suburban and interurban companies, but not listed in the Russell's Guide.
Great Eastern Bus Lines - existed in 1930's.
Hansen Motor Transit Co. - existed in 1930's.
Hiawatha Trails - existed in 1930's.