American Planning Association

Clearinghouse for information on Automated People Movers (APMs)

Transportation Research Board

Federal Highway Administration

Federal Highway Administration SAFETEA-LU

Federal Highway Administration “Community of Practice”

Federal Highway Administration GIS

Federal Highway Administration Highway Economic Requirements System - State Version (HERS-ST)

Federal Highway Administration Tribal Transportation Planning

Federal Highway Administration Resource Center

Federal Transit Administration

Federal Railroad Administration

Federal Aviation Administration

U.S. Census Bureau

Bureau of Transportation Statistics

U.S. Dept. of Transportation Maritime Administration

U.S. Environmental Protection Agency

Environmental Protection Agency’s Transportation Tools

Association of Metropolitan Planning Organizations

American Public Transportation Association

Institute of Transportation Engineers

Association of Collegiate Schools of Planning

Urban and Regional Information Systems Association

American Society of Civil Engineers

American Assoc. of State Highway and Transportation Officials

Surface Transportation Policy Project

National Center for Bicycling and Walking

National Safety Council - Driver Safety

City and Regional Planning Resources

Cyburbia

Planetizen

Greater Greater Washington

Elsevier

The Intermodal Association of North America (IANA)

National Railroad Hall of Fame

California Cool Fleets Cost and Emissions Calculator for Green Transportation

Railvolution

Regional Economic Models, Inc.

MPO Transportation Resources

The Antiplanner

World Streets

Infrastructurist

Digital Urban