Public Organizations

American Community Survey

American Association of State Highway and Transportation Officials (AASHTO)

American Planning Association

US Census Bureau

Federal Highway Administration

Federal Transit Administration

Institute of Transportation Engineers

Transportation Research Board (TRB)

US Department of Transportation

Transportation Suppliers

Airsage

Caliper Corp

Inro Consultants

Citilabs

Highway Capacity Manual

INRIX

Manual on Uniform Traffic Control Devices

McTrans

NAVTEQ

PTV America

Trafficware

Strong Concepts

Tom Tom

State Departments of Transportation

Alabama

Alaska

Arizona

Arkansas

California

Colorado

Connecticut

Delaware

District of Columbia

Florida

Georgia

Hawaii

Idaho

Illinois

Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

New Mexico

New York

North Carolina

North Dakota

Ohio

Oklahoma

Oregon

Pennsylvania

Puerto Rico

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Utah

Vermont

Virginia

Washington

West Virginia

Wisconsin

Wyoming