[iheartthed]

I don't really consider Windsor to be a metro area that is independent of Detroit. Windsor's economy is too closely linked to Detroit's for it to be separate.

Ann Arbor is a good example for the purposes of this thread. The economy of Ann Arbor is pretty independent of Detroit's economy, but it also depends heavily on Detroit's infrastructure (specifically the airport and utilities).

Toledo is another obvious beneficiary of proximity to Detroit. It is the only metro in Ohio that is located within an hour's drive of a major airport.