Walk
Score is a company which “analyzes hundreds of walking routes to nearby
amenities. Points are awarded based on the distance to amenities in each
category. Amenities within a 5 minute walk (.25 miles) are given maximum points.
A decay function is used to give points to more distant amenities, with no
points given after a 30 minute walk.”
Additionally,
Walk Score looks at pedestrian friendliness, a component which takes into
account population density, block length, and intersection density. (Source: http://www.walkscore.com/methodology.shtml).