Source: http://www.cnt.org/news/2009/10/06/promoting-walkable-neighborhoods/

October 6th, 2009

CNT promotes location efficient neighborhoods which have walkable streets, access to transit, mixed land uses, and concentration of retail and services. These neighborhoods require less time, money, and greenhouse gas emissions for residents to meet their everyday travel requirements. Walk Score was launched in 2007 to help people find walkable places to live. Walk Score is a web tool that calculates the walkability of an address by locating nearby stores, restaurants, schools, parks, and now public transit.
CNT is working with the makers of Walk Score, Front Seat, on a project that was recently funded by the Rockefeller Foundation. The Foundation awarded a grant to Front Seat to add public transit, transportation cost, and greenhouse gas emission data to Walk Score. CNT will provide Front Seat with the estimated transportation costs of a location as well as the household greenhouse gas emissions from transportation.
Today the makers launched WalkScore.org, where they’ll make the Walk Score source code publicly available. WalkScore.org will also host forums for discussing walkability, location efficiency, and further improvements to the Walk Score algorithm.
Read their press release or try out Walk Score. CNT is also a grantee of the Rockefeller Foundation which has been supporting the expansion of its H+T Affordability Index to cover 337 metro regions in the U.S.