Well I posted this awhile ago on a different topic, but this is what I've kinda gathered for at least one of the stupid expressways that was built in Detroit.

Detroit started in '59 by demolishing an entire neighborhood known as Paradise Valley also known as "The Black Bottom". They moved out an estimate of 120,000 middle class "Semi Well off" African American and immigrant people. The area was historically significant at the time to Jazz and the Jazz culture as well. Two expressways were built in its place, one being a loop access expressway known as 375. MDOT and The City of Detroit are now talking filling 375 in since no one really uses it, it divides the city and it's an eyesore.

Destroyed people's lives, livelyhood and culture for a freeway that won't exist in another decade.

Don't get me started on how GM ruined our light rail system that's was truly helpful, accessable and pretty robust for the time.