Who is in charge of building and maintaining of roads? Where does funding originate? How did route numbering systems get created?
What are Appalachian Regional Corridors (ARC)?
Established by the Appalachian regional Commission, the regional development corridors are roadways in Appalachia that are slated to be improved to a minimum of four-lane highway standards. In some cases, the corridors are to become freeways. Some of this upgrading process is complete (such as Interstate 68), but several significant improvements remain to be completed (such as Corridor H/U.S. 48).