Model T & General Motors were design by Henry Ford . The Model T put the world on simple , affordable , durable automobile . Ford sold 15 million Model T's before increasing production in May 1927 , Making the Model T one of the best-selling vehicles . In 1908 , there were about 18,000 miles of paved roads in the U.S. Ford Used light and strong vanaduim stell alloy for critical parts . Most auotmoblies in existence were luxurious novelties rather than afforable transport .