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57 LIST OF ABBREVIATIONS This section contains a list of abbreviations of the names of government departments, other organizations, legislation, agreements and other items, which are used in this report. AASHTO American Association of State Highway and Transportation Officials ARTBA American Road and Transportation Builders Association CCMTA Canadian Council of Motor Transport Administrators CSA Canadian Standards Association CTSW U.S. Department of Transportation's Comprehensive Truck Size and Weight Study FAF Freight analysis framework HTA Highway Traffic Act ISTEA Intermodal Surface Transportation Efficiency Act, 1991 LCV Longer combination vehicle. In the United States, either a double trailer combination with an allowable gross weight over 36,287 kg (80,000 lb), or a combination of two or more trailers that is much longer than a legal double; in Canada, only the latter. LFD Load factor design M.o.U. Federal-Provincial-Territorial Memorandum of Understanding on Inter- provincial Weights and Dimensions NAFTA North American Free Trade Agreement NASHTO Northeastern Association of State Highway and Transportation Officials OBDC Ontario Bridge Design Code OBF Ontario Bridge Formula OHBD Ontario Highway Bridge Design RTAC Roads and Transportation Association of Canada, became TAC in 1990 SASHTO Southeastern Association of State Highway and Transportation Officials SPIF Safe, productive and infrastructure friendly STAA U.S. Surface Transportation Assistance Act, 1982 TAC Transportation Association of Canada TEA-21 Transportation Equity Act for the 21st Century, 1998 TRB Transportation Research Board U.S. DOT U.S. Department of Transportation WASHTO Western Association of State Highway and Transportation Officials