ATC Public Transportation
   Fixed route and paratransit operations and management services throughout the country.
   http://www.atc-nec.com

American Public Transit Association
   An international organization for the bus, rapid transit and commuter rail systems industry, based in Washington, DC. Extensive directory of transit systems in the United States.
   http://www.apta.com/

Federal Transit Administration
   Compiles statistics and makes recommendations for U.S. mass transit.
   http://www.fta.dot.gov/

NJ Transit / PATH / New York City Subway Information
   Includes New Jersey Transit schedules and station information, subway station and line information, subway directions, and information about all three New York City area systems.
   http://www.njnyrails.com

New England Public Transit Resources
   Information about public transportation in Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. Includes operator listing and served areas.
   http://www.new-england-public-transit.org/

South West Transit Association
   Trade association for public transit agencies in Arkansas, Arizona, Kansas, Louisiana, New Mexico, Oklahoma, and Texas.
   http://www.swta.org/