Congress passed the Hepburn Act, which gave the Interstate Commerce Commission the power to determine maximum railroad rates and regulate other transportation.
Congress passed the Federal Highway Act, allocating $32 billion to build 41,000 miles of interstate highways. Interstate construction was enacted not only because of Americans’ growing dependence on automobiles but also as a national defense measure, creating a nationwide transportation network for the US military.
President Jimmy Carter and Panamanian leader Omar Torrijos signed the Panama Canal Treaties of 1977. The treaties provided for an end to US control over the canal by the year 2000, with the US reserving the authority to defend the canal as an internationally used waterway.