They Tore Down a Highway and Made it a River (and traffic got better) - Not Just Bikes

Not same story, but some points in common:

In Valencia, after a flood, they diverted a river. The plan was to use the new available space for an urban highway (it was the sixties...), but thanks to people push back it was turned into e beautfult park

https://metropolismag.com/projects/how-valencia-turned-crisis-river-into-park/

Utrecht in the Netherlands had a moat that they turned into a motorway, and then back into a canal a few years ago