The superhighways were developed in the 1950s.The wealthy whites abandoned the area when Obama policies indicated that the industrial power of America was over.
Bullshit. The middle and upper classes began abandoning Detroit long before anyone even heard of Obama.
Much of population movement was due to the superhighway system developed during the 60s and 70s which enabled people to live in the suburbs and work in the city.
People left Detroit starting with the riots in 1968. The city never recovered from that.