The following sites provide information on transportation policy, safety and related programs.

http://www.aashto.org
American Association of State Highway and Transportation Officials (AASHTO), home page

http://www.fhwa.dot.gov/
United States Department of Transportation, Federal Highway Administration, home page

http://mutcd.fhwa.dot.gov
Manual of Uniform Traffic Control Devices

http://www.fhwa.dot.gov/webstate.htm
List of state department of transportation web sites, maintained by the Federal Highway Administration

http://www.ntsb.gov
National Transportation Safety Board

http://www.byways.org/
National Scenic Byways Program

http://www.nps.gov/transportation/roads/
National Park Service Roads and Parkways

http://www.asce.org/
American Society of Civil Engineers