Como dizer "Calçadão" em inglês

Olá,

Calçadão = área onde o tráfego de veículos é proibido. Normalmente, trata-se de centros comerciais de grande movimentação de pedestres.

In English:
Pedestrian mall
Pedestrian street
Pedestrian zone
Pedestrian plaza
Auto-free zone
Car-free zone

A pedestrian mall (also known as a pedestrian street) is the most common form of pedestrian zone in large cities. It is a street lined with storefronts and closed off to most automobile traffic. Emergency vehicles have access at all times and delivery vehicles are restricted to either limited delivery hours or entrances on side streets.
source = Wikipedia

Pedestrian zones (also known as auto-free zones and car-free zones) are areas of a city or town reserved for pedestrian only use and in which some or all automobile traffic may be prohibited. They are instituted by communities who feel that it is desirable to have pedestrian-only areas. Converting a street or an area to pedestrian only use is called pedestrianisation.
source = Wikipedia

A avenida Times Square em Nova Iorque foi "pedestrianized" recentemente.