A public-private partnership of Norfolk Southern Corp., the Federal Highway Administration and the states of Virginia, West Virginia and Ohio has garnered financial approval for a large portion of the $251-million Heartland Corridor project. The parties reached an agreement Sept. 5 for the release of $95 million in federal funds for a double-stack clearance project between Hampton Roads, Va., and Columbus, Ohio. The project will focus on raising the clearance height of 28 tunnels to accommodate double-stack cargo containers. Work also calls for several intermodal terminals.