Stats from Brussels, which in 2022 closed the city center to through automobile traffic. In the area:
> 20% fewer cars
> 37% more bikes
> 21% fewer crashes
> 69% fewer crash fatalities
> 35% less toxic NO2 from diesel
> 10% rise in credit-card billings
https://www.politico.eu/article/brussels-city-center-good-move-success-politics-pentagon-belgian-district-automotive-traffic-reduction/