[Minato Ku]

I know, it has been done in Paris, while the number of cars was effectively reduced, the congestion increased.
I don't get the point to have less cars if we have more congestion.
Boulevard de Magenta redesign in Paris is a widely known as a big failure.

Paris situation is quite different of a lot of other cities.
Outside the freeways, most of the wide roads are located in the center and not in suburbs where roads are narrow (except radial roads to the center).