[favflam]

With no street parking, ambulances pass right through.

Also, you don't allow through-traffic of cars.

The only vehicular traffic are taxis (supply limited with licenses), delivery vehicles, emergency vehicles, and those rare people willing to pay $60 to drive into the city to pick up a box or furniture.

I live in a big city like this. Ambulances pass through just fine. The only traffic jams are tolled highways in/out of the city. And those highways are capped at 4 lanes wide with demand moderated with tolls.

If you do a return-on-asset, where asset=sqft of space in a city, you really want to kick out car drivers b/c they are the most space intensive with least return (economic boost/tax revenue). They are like moochers in cafes that buy the cheapest coffee and sit for 5 hours.