By the mid-1920s, the massive coal and steel industries of the Midwest had made that region the center of the new automobile industry. A major road-building program by the federal government carried the thousands of new cars produced each day to every corner of the country.

READING THE MAP How many states had factories involved with the manufacture of automobiles? In what regions was auto manufacturing concentrated?

CONNECTIONS On what related industries did auto manufacturing depend? How did the integration of the automobile into everyday life affect American society?