Guide for Conducting Forensic Investigations of Highway Pavements (2013) / Chapter Skim
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Pages 136-152
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136 A t t A c h m e n t Guide for Conducting Forensic Investigations of Highway Pavements: Background Research
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137 138 1. Introduction 139 2.
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138 1. Introduction Hundreds of pavement forensic investigations have been performed in this country over the decades to address a number of objectives.
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139 The approach for developing the guide consisted of the following activities: 1. Review the literature on forensic investigations.
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140 • To evaluate new products. • To evaluate existing pavement conditions and properties for use in determining rehabilitation strategies.
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141 There are four factors whose separate and combined effects define the performance of pavements. These are: • Pavement structure – Pavement type: new asphalt (with or without a cement treated base or CTB layer)
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142 noise-related issues. Accordingly, another critical element in an investigation is achieving the best balance between requirements, priorities, and available resources.
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143 historically used by highway agencies towards the build-up of knowledge (lessons learned) and the consistent dissemination of results throughout the agency.
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144 Figure 2. Project specific issues.
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145 and (6) document the project site using photographs and/or videos.
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146 process, closing the project file, and updating the forensic investigations database as appropriate. As was the case with the preparation of the detailed investigation plan, the use of flowcharts, checklists, examples, matrices, and forms is necessary for implementation of the plan and ensuring consistency and uniformity among investigations; they are also included in the guide.
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147 • Preliminary Investigation -- performing non-destructive data collection (e.g., FWD, longitudinal profile) and analysis, and once again determining if it is sufficient to answer the questions posed in establishing the investigation.
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148 To maximize the benefits to the state highway agencies as well as to the project, participating agencies were asked to assist with activities such as traffic control, coring/trenching, and pavement repairs. Each of the agencies was provided with a copy of the preliminary guide at least 1 month in advance of the actual field assessments.
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149 end of the project, were outperforming those on the south end of the project. It was hypothesized that the water table level and construction timing was the reason for the better performance on the northern end.
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150 during construction to use lighter rollers during compaction also contributing to the failure. 4.2.2.6 California The California Department of Transportation (Caltrans)
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151 – Avoiding premature conclusions about pavement performance. • A phased approach to forensic investigations to optimize agency resources.
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Abbreviations and acronyms used without definitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) NASA National Aeronautics and Space Administration NASAO National Association of State Aviation Officials NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration NTSB National Transportation Safety Board PHMSA Pipeline and Hazardous Materials Safety Administration RITA Research and Innovative Technology Administration SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005)
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