In 1999 the historic district of Pontevedra, a picturesque city of 85,000 residents in northwestern Spain, was clogged with traffic, its air filled with exhaust fumes and the cacophony of automobiles. Things are very different now.
— Read on au.news.yahoo.com/spanish-city-offers-a-road-map-for-a-future-with-far-fewer-cars-205417140.html

The key to reducing traffic, he believes, is preventing unnecessary cars from entering in the first place — by eliminating on-street parking, restricting speed of travel to a crawl, and putting in one-way streets with narrow lanes for cars and wide sidewalks for people, while claiming more public spaces for pedestrians and lighting them well.