High Quality Content by WIKIPEDIA articles! U.S. Route 40 (US 40) is a US highway running from Park City, Utah east to Atlantic City, New Jersey. In the US state of Delaware, it serves as a major east–west highway in northern New Castle County, Delaware, just south of Wilmington. It runs from the Maryland border east of Elkton, Maryland east to the Delaware Memorial Bridge over the Delaware River to New Jersey, at which point it is concurrent with Interstate 295 (I-295). Along the way, US 40 runs through suburban areas of Glasgow and Bear before following US 13 and I-295 around New Castle. US 40 is a multilane divided highway the entire length across Delaware.