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.
Appalachian Trail Bus Line - operated until 1943 (to Smoky Mountain Stages/Smoky Mountain Trailways)
Original route: Hayesville-Murphy-Maryville TN
Engelhard-Washington Bus Line - operated until 1971
Original route: Engelhard-Washington
Trailways member 1949-1971
Lincolnton Bus Co. - operated until 1963
Original route: Lincolnton-Gastonia
Trailways member 1943-1948
Piedmont Coach Co. - operated until 1944 (to Queen City Coach/Queen City Trailways)
Operated various directions from Wadesboro
Southern Coach Co. - 1943-1987
Original route: Durham-Dunn
1943-1951 was Durham-Dunn Bus Co.
Virginia Dare Transportation Co. - operated until 1987
Original route: Manteo-Sligo
Trailways member 1954-1987
W.B.& S. Bus Lines - operated 1944-1954 (to Southern Coach Co./above)
Original route: Southport-Whiteville
Washington-Oriental Bus Line - operated until 1943
Original route: Washington-Oriental