President Eisenhower signed the National Highway Act, “the largest infrastructure project in American history,” July 3, 1956—68 years ago today. The hosts of the This Day in Esoteric Political History podcast “are joined by Eddie Alterman, longtime editor of Car & Driver magazine, to discuss how the highway network reshaped the country and changed car culture.”

This Day in Esoteric Political History: “The Great American Road Trip”