Appalachian Development Highway System
established: 1972
type: Facility Construct
length mi: 59.9
location: Prestonsburg, Kentucky
location: Mackeyville, Pennsylvania
location: Columbus, Ohio
location: London, Kentucky
name: Corridor N
location: Chattanooga, Tennessee
location: Tioga, Pennsylvania
length mi: 127.7
location: Ebensburg, Pennsylvania
header type: UC
length mi: 53.7
state: OH
location: Morgantown, WV – Hancock, MD
location: Duncannon, Pennsylvania
established: 2002
length mi: 30.4
length mi: 15.8
location: Clarksburg, West Virginia
established: 1991
length mi: 22.9
name: Corridor P
name: Corridor V
location: Binghamton, New York
name: Corridor B-1
name: Corridor G
name: Corridor A
location: Port Matilda, Pennsylvania
route: 422
title: Appalachian Development Highway System
name: Corridor S
location: Pikeville, Kentucky
state: MD
location: Cumberland Gap, Tennessee
length mi: 14.2
length mi: 105.1
name: Corridor F
location: Caryville, Tennessee
length mi: 52.5
length mi: 247.6
location: Greenup, Kentucky
type: Street Generic
name: Corridor J-1
location: Sutton, West Virginia
name: Corridor W
location: Cumming, Georgia
location: Christiansburg, Virginia
location: Dawsonville, Georgia
length mi: 27.3
location: Mount Carmel, Ohio
location: Erie, Pennsylvania
location: Sandy Springs, Georgia
location: Dillsboro, North Carolina
location: Bellefonte, Pennsylvania
type: Thing
name: Corridor M
state: NY
location: Lucasville, Ohio
type: Future
location: Weston, WV – Strasburg, VA
location: Elmira, New York
name: Corridor O
formed: 1965-03-09
location: Clyde, North Carolina
state: NC
length mi: 220.3
name: Corridor X
location: Pikeville, KY – Charleston, WV
length mi: 305.5
state: WV
length mi: 3090
location: Morristown, Tennessee
map alt: Map of the Appalachian Development Highway System
length mi: 59.5
length mi: 202.22
name: Corridor X-1
name: Corridor P-1