Corridor H is a 148 mile segment of the Appalachian Development Highway System (ADHS) that will eventually link I-81 in Virginia to I-79 in Weston, West VA, along the Allegheny Mountains. About 83% or 2,522.39 miles of the ADHS stood completed at the close of 2013; a regional highway network expected to cost an estimated $11.4 billion in 2010 dollars when finished.