Federal Transit Administration
Compiles statistics and makes recommendations for U.S. mass transit.

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.

South West Transit Association
Trade association for public transit agencies in Arkansas, Arizona, Kansas, Louisiana, New Mexico, Oklahoma, and Texas.

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.

ATC Public Transportation
Fixed route and paratransit operations and management services throughout the country.

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.