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C H A P T E R 2 Information Gathering and Review This chapter discusses the state of the practice with regard to Transportation Research Board (TRB) and TRB Research preservation approaches for high-traffic-volume roadways. in Progress database. The content is based on two primary sources: a literature review American Association of State Highway and Transportation and responses to a survey of the practices of state and other Officials (AASHTO). highway agencies. The chapter begins with a brief description Federal Highway Administration (FHWA) and National of the information-gathering process and concludes with Highway Institute (NHI). the state-of-the-practice synthesis organized around the State department of transportation (DOT) research libraries. following items: Pavement preservation centers: Foundation for Pavement Preservation (FP2); Types of preservation treatments used on high-traffic- National Center for Pavement Preservation (NCPP); volume roads; and Special considerations for high-traffic-volume treatments; California Pavement Preservation Center (CPPC). Performance of treatments on high-traffic-volume facilities; National pavement centers: and National Center for Asphalt Technology (NCAT); and Cost-effectiveness of preservation treatments. National Concrete Pavement Technology Center (CP Tech Center). Industry associations: Information Gathering National Asphalt Pavement Association (NAPA); Asphalt Institute (AI); Literature Search Association of Asphalt Paving Technologists (AAPT); American Concrete Pavement Association (ACPA); A comprehensive literature search was conducted at the Portland Cement Association (PCA); outset of the study and focused on information pertaining International Slurry Surfacing Association (ISSA); to pavement preservation practices and experiences. This Asphalt Recycling and Reclaiming Association (ARRA); search, largely limited to work reported in the last 5 years, and was national and international in scope and was performed International Grooving and Grinding Association primarily via the Internet and through manual searches of the (IGGA). libraries, files, and other resource materials of the individual American Society of Civil Engineers (ASCE). project team members. Innovative Pavement Research Foundation (IPRF). Among the key sources tapped in the literature search were American Society for Testing and Materials (ASTM). the following: International Organization for Standardization (ISO). Transportation Association of Canada (TAC). Transportation Research Information Services (TRIS) International Road Federation (IRF). database. World Road Association (PIARC). National Technical Information Service (NTIS) database. Australian Road Research Board (ARRB). Engineering Index and Compendix. Laboratoire Central des Ponts et Chausses (LCPC; French National Transportation Library (NTL). public works research laboratory). 9