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74 AC asphalt concrete ALDOT Alabama Department of Transportation AASHTO American Association of State Highway and Transportation Officials ASCRL asphalt-stabilized crack relief layer ATPB asphalt-treated permeable base ATPBC asphalt-treated permeable base course CABC crushed aggregate CABCDG crushed aggregate, type DG Cd drainage coefficient CTPBC cement-treated permeable base course D10 sieve size that 10Â percent of material passes through D60 sieve size that 60Â percent of material passes through DOT Department of Transportation DRIP Drainage Requirements in Pavements DSB drainable stable base EPG Engineering Policy Guide FHWA Federal Highway Administration FWD falling weight deflectometer GCBD geocomposite capillary barrier drain GEM Geotechnical Engineering Manual GPR ground-penetrating radar HDPE high-density polyethylene HMA hot-mix asphalt LTPP Long-Term Pavement Performance MnDOT Minnesota Department of Transportation MoDOT Missouri Department of Transportation NCHRP National Cooperative Highway Research Program OGAB open-graded aggregate base OGBC open-graded base course OGS open-graded subbase PAB permeable aggregate base PASB permeable asphalt-stabilized base PASSRC permeable asphalt-stabilized stress relief course PATB permeable asphalt-treated base PCC Portland cement concrete PDM Pavement Design Manual PE polyethylene PennDOT Pennsylvania Department of Transportation Abbreviations
Abbreviations 75Â Â PG performance-graded PGED preformed geocomposite edge drain PVC polyvinyl chloride SHRP Strategic Highway Research Program SPS Specific Pavement Studies TMI Thornthwaite moisture index TPBC treated permeable base course U.S. states are also denoted by their two-letter abbreviations. A list of two-letter abbreviations for all states that responded to the survey is provided in Appendix B.
