Number: 98-973 Title: APPALACHIAN DEVELOPMENT HIGHWAY PROGRAM (ADHP): AN OVERVIEW Authors: Robert S. Kirk, Economics Division Abstract: The Appalachian Development Highway Program (ADHP) is a road building program that is intended to break Appalachia's regional isolation and encourage Appalachian economic development. The ADHP is authorized to develop a network of 3,025 miles of corridor roads. At the end of 1997, 2,258 miles, comprising 75 percent of the approved corridor roads, were open to traffic. Pages: 6 Date: Updated December 7, 1998