US cities built in the 20th Century have long catered for a population that prefers to take the car to shop, dine and work. But an ageing population and a young professional workforce looking for an urban lifestyle have forced city planners to reconsider the existing road and pavement infrastructure.
But how do you remake a city into a pedestrian dream, and how do you re-educate the public about its transportation choices?
How to get America to walk (BBC)
The city of St Louis, Missouri, remains one of the most segregated cities in the US, according to a study by the Manhattan Institute. But one street in particular has been known to residents as the "dividing line".
Delmar Boulevard, which spans the city from east to west, features million-dollar mansions directly to the south, and poverty-stricken areas to its north. What separates rich and poor is sometimes just one street block.
Crossing a St Louis street that divides communities (BBC)