American Association of State Highway and Transportation Officials (AASHTO)
	American Public Works Association
	American Planning Association
	American Society of Civil Engineers
-	American Road and Transportation Builders Association
-	American Society of Highway Engineers
-	Canadian Society for Civil Engineering
	American Traffic Safety Services Association
-	FHWA – Federal Highway Administration
	Intelligent Transportation Society of America
-	Intelligent Transportation Society of Canada
	McTrans
	National Highway Traffic Safety Administration
-	National Transportation Library
-	North Carolina Transportation Hall of Fame
-	Transportation Association of Canada
	Transportation Research Board
-	Transport Canada
-	USDOT Bureau of Transportation Statistics