American Public Transportation Association, www.apta.com.
American Public Works Association, www.apwa.net
National Transportation Enhancements Clearinghouse, www.enhancements.org
Surface Transportation Policy Project, http://www.transact.org
The National Center for Bicycling and Walking, http://www.bikefed.org/
The U.S. Dept of Transportation Federal Highway Administration, www.fhwa.dot.gov
Information on reauthorization of the Transportation Equity Act of the 21st Century, www.tea3.org American Association of State and Highway Officials, www.aashto.org