Longest highways in America

(STACKER) - President Dwight D. Eisenhower considered the U.S. Interstate Highway System one of his most important achievements in office, and Americans agree, having dubbed the highway network the "Greatest Public Works Project in History," according to the Federal Highway Administration.At a total of 46,876 miles long, the interstate network is estimated to have cost $128.9 billion to construct, with the federal government footing 90% of the bill. The coast-to-coast surface transport