Defenders of Wildlife (Defenders)
Defenders is dedicated to the protection of all native wild animals and plants in their natural communities. The group focuses on programs the accelerating rate of extinction of species and the associated loss of biological diversity, and habitat alteration and destruction.

National Trust for Historic Preservation (NTHP)
NTHP is a private, nonprofit membership organization dedicated to saving historic places and revitalizing America's communities.

Surface Transportation Policy Project (STPP)
STPP is a non-profit, diverse, nationwide coalition working to ensure safer communities and smarter transportation choices that enhance the economy, improve public health, promote social equity, and protect the environment.

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American Council of Engineering Companies (ACEC)
ACEC is the national organization devoted exclusively to the business and advocacy interests of engineering companies.

American Road and Transportation Builders Association (ARTBA)
ARTBA is the U.S. transportation construction industry's representative in Washington, D.C. Its mission: advocating strong federal investment in the nation's transportation infrastructure to meet public demand for a safe and efficient business transportation network.

Associated General Contractors of America (AGC)
AGC, the voice of the construction industry, is an organization of qualified construction contractors and industry related companies dedicated to skill, integrity, and responsibility. Operating in partnership with its Chapters, the association provides a full range of services satisfying the needs and concerns of its members, thereby improving the quality of construction and protecting the public interest.

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APTA - American Public Transportation Association
APTA is a leading force in advancing public transportation, with a mission to strengthen and improve public transportation. APTA serves and leads its diverse membership through advocacy, innovation and information sharing. APTA and its members and staff work to ensure that public transportation is available and accessible for all Americans in communities across the country.

AMPO - Association of Metropolitan Planning Organizations
AMPO is the transportation advocate for metropolitan regions and is committed to enhancing MPOs' abilities to improve metropolitan transportation systems.

NARC - National Association of Regional Councils
NARC is a nonprofit membership organization serving the interests of regional councils and metropolitan planning organizations nationwide.

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