[Jackim]

There are some pedestrian streets in the City I live in that have commercial, office, and residential buildings along it. Delivery trucks are permitted on the street. There are anchors for removeable bollards which are installed during events to prevent any vehicle traffic from coming in.

Regarding traffic, generally traffic increases as you build more roads. If you build more transit, cycling, and walking infrastructure, the same rule applies. If you remove roads, you are creating more of an incentive to use alternative modes. It's obviously not an instant effect, but as lanes are being removed from cars and converted to allowed bicycles in Paris, vehicle traffic has reduced by 5% in 10 years.

[andreygrehov]

I get that a solution does exist. But you can't simply throw an idea and have someone else implement it for you. First, you need to describe a problem. Like, why do you believe that, say, Court Street should be car-free. Next, propose a solution. Do cost and risk analysis. Have people review it all. Only after we can start a conversation.

There are so many unknown unknowns that I don't even want to try to guess.

The author of the project decided to go with New York as the first candidate for transformation. In my opinion, this is a mistake. New York is likely one of the most challenging cities in the world to transform.