How Has the Geography of Detroit Changed?
Detroit had been the center of the auto industry since Henry Ford and the Model T and was home to huge manufacturing plants like the Packard Plant and the Ford River Rouge Plant. Beginning in the 1950s, however, auto manufacturing began to move outside of the city, to the suburbs, and overseas. Ultimately, it would move almost entirely overseas, despite union opposition.
The move to the suburbs was made possible by freeways, such as the Chrysler Freeway, which as Interstate 75 was part of the federal effort to build an interstate highway system.
Suburban development was also heavily subsidized, and because of federal housing loan policy, suburban homes were often only available to whites. "White flight" began well before the 1967 riots and was enabled and shaped by policy decisions at the local, state, and federal levels.