11. Interstate Highway and Transportation Networks
The United States’ development of extensive highway, rail, and air transport systems has significantly increased mobility for people and goods, unifying markets across the nation. The Interstate Highway System, established by the Federal-Aid Highway Act of 1956, created a network of controlled-access highways spanning over 41,000 miles, facilitating efficient cross-country travel and commerce. (history.com) This infrastructure has been a model for transportation networks worldwide, influencing the development of similar systems in other countries.
