1. Rubber Manufacturers Association, US Scrap Tire Management Summary 2005–2009, Washington, DC; 2011.
2. Heitzman M. State of the practice – design and construction of asphalt paving materials with crumb rubber modifier. Research Report No. FHWA-SA-92-022. Washington, DC: Federal Highway Administration; May, 1992.
3. FHWA. ISTEA Section 1038 and Section 325 of HR 2750. Memorandum from executive director. Washington, DC: Federal Highway Administration; November 2, 1993.
4. Epps J. Use of recycled rubber tires in highways – A synthesis of highway practice. NCHRP Synthesis 198, National Cooperative Highway Research Program, TRB. Washington, DC: National Research Council; 1994.
5. Public Law. Intermodal surface transportation efficiency act of 1991. Public Law 102–240; December 18, 1991.