Paris is banning traffic from half the city. Why can’t London have a car-free day?

The streets of Paris will be transformed this Sunday, with thousands of people on foot and on bikes expected to take advantage of a ban on cars that covers almost half of the city centre. Mayor Anne Hidalgo promoted the first Journée Sans Voiture a year ago, in response to a rise in air pollution that briefly made the French capital the most polluted city in the world.
Read more: https://www.theguardian.com/cities/2016/sep/22/paris-ban-traffic-london-world-car-free-day?source=Snapzu