The main supporter of the Interstate Highways System was?

The main supporter of the Interstate Highway System was President Dwight D. Eisenhower. He recognized the need for a national network of highways for defense and economic efficiency, inspired in part by his experiences with the German autobahn during World War II. The Federal-Aid Highway Act of 1956, which established the system, was largely championed by his administration, leading to the construction of over 41,000 miles of interstate roads across the United States.