22 September is World Car Free Day, when all around the world towns and cities allow people to experience streets free of motor traffic. It's a great chance to re-imagine our streets around people.

The World Carfree Network says that the World Car-Free Day can be a showcase for just how our cities might look like, feel like, and sound like without car 365 days a year.

Car-free days are an opportunity for cities to highlight how congested roads can be used in different ways. From races for alternative-energy powered vehicles in Budapest, to horse-riding in São Paulo, to street picnics in Vienna, to running in Jakarta, cities and the people who live in them are stressing the alternatives to polluting vehicles on this important day.