About 30,000 sites now use Walk Score's walkability grading system. The Seattle-based company, has done a lot to encourage people to factor in walkability when deciding where to live.
Walk Score's latest ranking of America's most walkable cities shows the best from last year are still the best today. New York, San Francisco and Boston occupy the first three places, as they did last year. Philadelphia, Miami and Chicago come next. Each is classified as "very walkable," which means "most errands can be accomplished on foot."
Walk Score assesses proximity to neighborhood amenities, crunching data for 10 million addresses and 2 billion walking routes. This year, it added a couple of extra criteria, including "depth of choice" in an area and "pedestrian friendliness."