The American Association of State Highway and Transportation Officials provides education, industry standards, news, and other resources.

555 12th Street, NW, Suite 1000
Washington, D.C. 20004-1200
Tel: (202) 624-5800
Email: info@aashto.org
https://www.transportation.org

The International Bridge, Tunnel and Turnpike Association offers industry news, events, and membership benefits.

1146 19th Street, NW, Suite 600
Washington, D.C. 20036-3725
Tel: (202) 659-4620
https://www.ibtta.org

The International Brotherhood of Teamsters represents workers in various occupations in the public and private sectors.

25 Louisiana Avenue, NW
Washington, D.C. 20001-2130
https://teamster.org

The International Federation of Professional and Technical Engineers is a union that represents workers in professional, technical, administrative, and associated occupations.

501 3rd Street, NW, Suite 701
Washington, D.C. 20001-2771
Tel: (202) 239-4880
Fax: (202) 239-4881
Email: generalinfo@ifpte.org
http://www.ifpte.org