Bicyclists, moms with strollers, people in wheelchairs, transit riders, window-shoppers, and even cars all have their place on Alleg Street in Boras, Sweden. This works because of the careful design of the street, notably the diversity of paving surfaces that help define different functions at various spots. Sidewalks are smoother where foot traffic is fastest, for instance, just as curbs disappear where vehicular traffic should be slowest. All told, no fewer than six different types of paving surfaces differentiate sidewalks, waiting areas, curbs, bike lanes, crosswalks, and car lanes.