associations
American Planning Association Policy Guide on Smart Growth
American Planning Association Policy Guide on Surface Transportation
Economic Benefits of Open Space
Economic Value of Walkability
Elements of Smart Growth - Smart Growth America
National Charrette Institute - Healthy Communities
Rails to Trails Conservancy
Rails-Trails and Safe Communities: The Experience on 372 Trails
Thunderhead Alliance Bicycle Advocacy
Trails and Greenways Clearinghouse
Trinity Trust
The Rivers, Trail, and Conservation Assistance Program