The Federal Highway Administration (FHWA) is the division of the U.S. Department of Transportation that oversees national highway transportation programs.  FHWA is the conduit for Federal funds that support the National Highway System, which includes interstate and state highways and other roadways funded with Federal dollars.  FHWA has a number of programs to provide technical assistance and expertise to the state transportation agencies.

Federal Highway Administration (FHWA) Recycled Materials Policy 
FHWA’s policy statement is designed to advance the use of recycled materials in highway applications. The policy outlines the importance of re-using materials previously used in constructing the Nation's highway system, and calls upon the FHWA and State transportation departments to explicitly consider recycling as early as possible in the development of every project.
http://www.fhwa.dot.gov/legsregs/directives/policy/recmatmemo.htm

Office of Pavement Technology Recycling Homepage
One focus area for the Federal Highway Administration’s (FHWA) Office of Pavement Technology is environmental stewardship, which includes material reuse and recycling.  Their recycling website includes information on FHWA’s current projects and activities to facilitate the use of recycled materials in the highway environment.  Foundry sand is one of FHWA’s priority materials, although the agency recognizes that there may not be sufficient quantities in all states to built large state DOT projects.
http://www.fhwa.dot.gov/pavement/recycling/index.cfm
 
Foundry Sand Facts for Civil Engineers, FHWA-IF-04-004, May 2004
Provides an overview of technical information on the potential uses of foundry sand in civil engineering applications.  The fact book was developed by the Federal Highway Administration, an agency of the U.S. Department of Transportation, in cooperation with Foundry Industry Recycling Starts Today and the U.S. Environmental Protection Agency.
http://isddc.dot.gov/OLPFiles/FHWA/011435.pdf

Report on Use of Recycled Foundry Sand in the Cleveland Area
FHWA staff report providing a review on the uses of foundry sand in roadway construction around the Cleveland, Ohio area.  The report concludes that foundry sand works well in a variety of highway applications and can be placed and compacted using standard construction equipment.
http://www.fhwa.dot.gov/pavement/recycling/cleveland.cfm

Recycled Material in Highway Construction:  March 2010 NHI Innovations Webinar
The National Highway Institute (NHI) is FHWA's training arm.  In March of 2010, FHWA partnered with NHI to present a webinar on use of recycled materials in Highway Construction.  The webinar involved a variety of speakers and touched upon FHWA policy issues, market potential, and case studies involving a range of materials, as well as tools and resources available to transportation engineers.
https://fhwa.na3.acrobat.com/n1340832010march

User Guidelines for Industrial Byproduct Materials in Pavement Construction
The User Guidelines are an FHWA-developed information resource for 20 different byproduct materials in road construction.  The Guidelines were recently updated to include current information about the U.S. EPA’s Resource Conservation Challenge priority materials, coal ash, foundry sands and construction and demolition materials, along with current information about environmental considerations in the use of byproduct materials.
http://www.recycledmaterials.org/tools/uguidelines/index.asp

FHWA’s Local Technical Assistance Program
The LTAP program is a conduit to communicate research, best practices, technical assistance and training resources to the local governments and agencies who are responsible for more than three million (3,000,000) miles of roadways in the U.S.   The LTAP website provides listings of the state LTAP centers,  which are often located within state university engineering departments.   FHWA, RMRC  and EPA are working to educate the LTAP centers about the opportunities to use industrial materials such as foundry sand.
http://www.ltapt2.org/

FHWA National Highway Specifications Website
Developed and maintained by the Federal Highway Administration, this website consists of a searchable library of highway specifications from across the nation. 
http://fhwapap04.fhwa.dot.gov/nhswp/index.jsp

State Transportation Websites
Links to state transportation websites from the Federal Highway Administration website
http://www.fhwa.dot.gov/webstate.htm

American Association of State Highway and Transportation Officials (AASHTO)
The American Association of State Highway and Transportation Officials (AASHTO) represents the state highway agencies of all 50 states, the District of Columbia, and Puerto Rico.    In addition to communicating transportation priorities to the U.S. Congress, AASHTO provides a liaison between the states and with the U.S. Department of Transportation, Federal Highway Administration, and other Federal agencies.  AASHTO has a number of technical and research committees and collaborates with other agencies and organizations.  AASHTO establishes technical specifications for highway construction practices that are generally adopted by state highway departments.
http://www.transportation.org/

AASHTO Center for Environmental Excellence
The AASHTO Center for Environmental Excellence is a resource for transportation professionals who are seeking best environmental practices and other sustainability options for transportation infrastructure projects.
http://environment.transportation.org/

Center for Environmental Excellence – Waste Management, Recycling & Brownfields
Waste management and Recycling are among the Environmental Issues addressed by the AASHTO Center for Environmental Excellence.  Foundry sand is included among the materials that are suitable for use in transportation projects.  This page also provides links to FHWA and RMRC resources.
http://environment.transportation.org/environmental_issues/waste_manage_recyc/

Subcommittee on Materials
The AASHTO Subcommittee on Materials (SOM) focuses on developing specifications for materials used in the construction and maintenance of all transportation facilities including highways, bridges and structures, and standard methods of sampling and testing these materials; and serves as a conduit to exchange information on the performance of special products evaluated by AASHTO Member Departments.  The Subcommittee on Materials also maintains and updates the Standard Specifications for Transportation and Methods of Sampling and Testing, and Provisional Standards Materials reference which contains 418 materials specifications and test methods commonly used in the construction of highway facilities.
http://materials.transportation.org/default.aspx

Green Highways Partnership
The Green Highways Partnership (GHP) is a public-private collaborative to diminish the environmental footprint of transportation infrastructure projects.   The GHP was initiated as an outreach effort by EPA Region 3 (Philadelphia) staff members, and continues to evolve to bring together an ever-wider range of Federal, state and private sector partners, including the Federal Highway Administration, state transportation agencies, and state environmental agencies.
http://www.greenhighwayspartnership.org

GHP Recycling and Beneficial Reuse Group
Clicking on the green recycling symbol anywhere on the GHP site takes the reader to the landing page for the Reuse/Recycling Program Group.   Foundry sand is one of the materials whose benefits are described, along with links to the AFS-FIRST website and other pertinent information.
http://www.greenhighwayspartnership.org/index.php?option=com_content&view=article&id=23&Itemid=22