"Portland is trying to be North America's most walkable city by employing a vision for 20-minute communities in much of its current planning. There's a lot of power in this idea, and if done right, it can be influential beyond the Rose City. The key though, as I see it, is not to embellish Portland's thriving boutique districts, but instead to strengthen the places that are lacking structural riches. If the city can do this, it will have accomplished something that can inform planning everywhere."
This slideshow takes a look at one neighborhood where the "20-minute" goal has yet to be achieved.