The story of America’s interstates is usually told as a straightforward tale of postwar progress, but the real origins are stranger and more contested than the green signs suggest. The Dwight D.

COLUMBIA, S.C. (AP) — The leader of South Carolina 's roads agency has been to so many groundbreaking ceremonies for highway projects that he has the whole routine down. Signs were printed, fancy ...

As the United States marks its 250th anniversary, WTOP presents “250 Years of America,” a multipart series examining the innovations, breakthroughs and pivotal moments that have shaped the nation ...

WASHINGTON – The future of the U.S. Interstate Highway System is threatened by a persistent and growing backlog of structural and operational deficiencies and by various looming challenges, such as ...

Ever wondered how the highway and interstate numbers came to be? What do they even mean if they mean anything at all? Behind those numbered shields displayed on the signs is a mathematical logic grid ...

The interstate highway system transformed the U.S. economy and American life in the 20th century. High-speed rail can have a similar effect in the 21st century, reindustrializing and reconnecting ...