Sidewalks: we’re lucky that we have them. Just ask people who live in America’s sprawling suburbs and some of the Atlanta, Ga., region’s new cities. Author Jane Jacobs considered them essential to the urban fabric. Sidewalks move people, connect places, and they are key, wrote Jacobs, to healthy neighborhoods and cities. Although Atlanta’s Candler Park neighborhood is connected by sidewalks as old as the neighborhood itself, they don’t always work well because many stretches have been damaged by vehicles and roots or have not been well maintained.