It is hard to believe that just 100 years ago, most people still got around either by foot or (if they were lucky) on horseback. These days, many Americans don’t just drive cars; they couldn’t live without them. As cities continue to siphon off people from the suburbs though, many municipalities are looking for ways to cut down on the increased traffic that comes with too many cars.

San Juan, the capital (and most populous city) of the island of Puerto Rico, is faced with a series of challenges. An over-reliance on cars has left the city over developed and under planned, with many pristine beaches inaccessible, the traffic an absolute nightmare. This is especially true in Isleta, or Old San Juan. But a $1.5 billion infusion of cash hopes to change Old San Juan into a walkable city where cars aren’t allowed.