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Weigh-in-motion (WIM) systems provide an estimate of the static weight of moving vehicles. WIM data is used for transportation and freight planning, pavement and bridge design, and highway safety investigations.

NCHRP Research Report 1070: Tools for Assuring WIM Data Quality: Practical Guide, from TRB's National Cooperative Highway Research Program, provides state departments of transportation with new procedures to help practitioners improve accuracy and increase the reliability of WIM data.

Supplemental to the report are NCHRP Web-Only Document 370: LTPP Data Analysis: Practical Tools and Procedures to Improve WIM Data Quality and six Excel spreadsheet tools.

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Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2023. Tools for Assuring WIM Data Quality: Practical Guide. Washington, DC: The National Academies Press. https://doi.org/10.17226/27234.

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Publication Info

164 pages |  8.5 x 11 |  Paperback
ISBN: 978-0-309-69904-4
DOI: https://doi.org/10.17226/27234
Chapters skim
Front Matter i-viii
Chapter 1 - Introduction 1-3
Chapter 2 - WIM Equipment Selection 4-15
Chapter 3 - WIM Site Assessment 16-33
Chapter 4 - WIM Installation Quality Assurance 34-64
Chapter 5 - WIM Equipment Maintenance 65-81
Chapter 6 - WIM Equipment Calibration 82-96
Chapter 7 - WIM Data Quality Assurance and Analysis 97-129
Chapter 8 - WIM Data Acceptance Considerations and Criteria 130-138
Appendix A - WIM Site Design Catalog 139-147
Appendix B - WIM Site Design Plan and Cabinet Wiring Diagrams 148-151
Appendix C - Weight Record Format from 2016 FHWA Traffic Monitoring Guide 152-153
References 154-156

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