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.
Suburban and interurban bus companies listed in the Russell's Official National Motor Coach Guide, which was primarily a resource for intercity bus lines.
Ingram Bus Lines (to Wetumpka and Auburn and Opelika, until 1992)
Drinkard Bus Line - existed in 1940's and 1950's.
Head Bus Line - existed in 1930's.
Jackson Bus Line - existed in 1930's.
Thomas Coaches - existed in 1930's.