A future town centre without polluting vehicles?

Does the future town centre have no carbon emitting vehicles? If it can work in huge cities around the world, how would it be in a small town like Kinsale?

London: https://www.fastcompany.com/90248746/the-city-of-london-is-kicking-cars-off-half-its-roads

Madrid: https://www.theguardian.com/cities/2018/nov/30/its-the-only-way-forward-madrid-bans-polluting-vehicles-from-city-centre