Additional bus companies, listed as existing during 1930's, are mentioned in the WPA American Guide Series of state guidebooks.
Beaumont-Port Arthur Bus Line - intercity served Port Arthur, Beaumont, Liberty, Cleveland, Conroe, San Antonio, Llano, Goldthwaite, Eastland.
Norton's Bus Line - existed in 1930's, served Beaumont.
P&G Bus Line - existed in 1930's, served Port Arthur.