EXIT 275, INTERSTATE 70, Kan. — There were no Wal-Marts in 1956, no Ramada Inns or Best Westerns. Cross-country travel most often meant the railroad and only about two-thirds of adult Americans had a driver’s license. But that America began to change on June 29, 1956, when President Dwight D. Eisenhower signed the law launching a massive federal project that had been his dream for decades: the Interstate Highway System.

The Superhighway to Everywhere