Being a North American resident, it really makes me wonder what it would take to build political will for these types of projects on this side of the ocean. In San Francisco, closing even one part of one street to auto traffic is something that seems to be impossible — even for projects that _should_ be relatively uncontentious like closing some of the highways through Golden Gate Park, making the most pedestrian heavy parts of famous streets like Haight, Castro, or Lombard pedestrian-only, or taking private cars off Market Street. And quite sadly, SF is considered to be a walking-friendly city relative to others on the continent.
It's nice that someone is acting as a guiding light for the rest of the world, especially when it's a city of Paris' fame/importance.
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[1] https://www.citylab.com/solutions/2016/09/paris-seine-car-pe...
[2] https://www.citylab.com/transportation/2016/05/paris-is-bann...