Additional bus companies, listed as existing during 1930's, are mentioned in the WPA American Guide Series of state guidebooks.
Bowling Green Transit Co. - served Franklin, Russelville, Glasgow, Scottsville, Mammoth Cave, Brownsville, Morgantown.
Fleenor Lines - existed in 1930's, served Covington and Harrodsburg and Lexington.
Nunelly Lines - existed in 1930's, served Lexington and Frankfort.
Ohio Lines - existed in 1930's, served Paducah.
Owenton Bus Line - served North Pleasureville, Smith Field, Ballardsville, Worthington, Springdale, Louisville.
C. Ray Lines - existed in 1930's, served Paducah.
Union Bus Line - suburban based in Morganfield.
V. T. C. Lines - suburban service within Harlan County.