Manual on Uniform Traffic Control Devices (MUTCD) http://mutcd.fhwa.dot.gov/pdfs/2009/pdf_index.htm
FHWA Standard Highway Signs http://mutcd.fhwa.dot.gov/ser-shs_millennium.htm
American Association of State Highway and Transportation Officials (AASHTO) http://www.transportation.org/
American Public Works Association (APWA) http://www.apwa.net/
American Road & Transportation Builders Association (ARTBA) http://www.artba.org/
American Traffic Safety Services Association (ATSSA) http://www.atssa.com/cs/home
Please visit ATSSA’s political advocacy website and take action to support roadway safety: http://www.capitolconnect.com/atssa/
Federal Highway Administration (FHWA) http://www.fhwa.dot.gov/
Institute of Transportation Engineers (ITE) http://www.ite.org/
International Council of Shopping Centers (ICSC) http://icsc.org/
International Municipal Signal Association (IMSA) http://www.imsasafety.org/
Federal Aviation Administration (FAA) http://www.faa.gov/
Airport Consultants Council (ACC) http://www.acconline.org//AM/Template.cfm?Section=Home