National Academies Press: OpenBook
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Suggested Citation:"Contents." National Academies of Sciences, Engineering, and Medicine. 2014. Review of U.S. Department of Transportation Truck Size and Weight Study: First Report: Review of Desk Scans. Washington, DC: The National Academies Press. doi: 10.17226/22416.
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Review of U.S. Department of Transportation Truck Size and Weight Study First Report: Review of Desk Scans Contents: Summary 1 Introduction 4 General Observations 7 Bridge Structure 10 Pavement 17 Modal Shift 22 Highway Safety and Truck Crash 32 Enforcement and Compliance 39 Appendix A: MAP-21 Section 32801. Comprehensive Truck Size and Weight Study 43 Appendix B: Statement of Task 45 Appendix C: Parties Submitting Comments to the Committee 46 Appendix D: Review of the Document 47 Study Committee Biographical Information 48 Transportation Research Board National Research Council Washington, DC March 31, 2014

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The Committee for Review of U.S. Department of Transportation (USDOT) Truck Size and Weight Study has released its first of two reports. The Review of Desk Scans letter report reviews five preliminary products of the study of truck size and weight limits that the 2012 surface transportation authorization statute requires USDOT to carry out. The five preliminary products of the study, called desk scans, are surveys of past research and analysis methods for estimating the effects of changes in truck size and weight limits in each of five areas: bridges, pavements, truck and rail shares of freight traffic, safety, and enforcement of truck regulations.

The committee that produced the report recommends that USDOT continue the work begun in the desk scans by including two kinds of synthesis in its final report: first, a synthesis of experience in applying alternative methods of estimating each category of effect of changes in truck characteristics, leading to an assessment of the current state of understanding of the impact and needs for future research, data collection, and evaluation; and second, a critical synthesis of quantitative results of past prospective and retrospective estimates of each category of effect.

The results of these syntheses would inform the ability to reach firm conclusions about the consequences of changes in truck size and weight limits on safety, efficiency, infrastructure, and the environment.

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