The membership of the American Association of State ​Highway and Transportation Officials is composed only of instrumentalities of government. The membership of this Association is by Member Departments, which shall be those Departments or Agencies of the States of the United States, Puerto Rico, and the District of Columbia in which the official highway responsibility for that State or Territory is lodged, and the United States Department of Transportation, which is an ex-officio member.

To find out more, visit the Board of Directors Charge Statement and General Information page. For information on our Associate Members, visit the Meetings and Members Services site.