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Freeway congestion usually occurs at freeway merge, diverge, and weaving segments that have the potential to develop bottlenecks. To alleviate or mitigate the impacts of congestion at these segments, a number of active management operational strategies have been implemented such as ramp metering, hard shoulder running, managed lanes, and others.

The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 343: Traffic Modeling Document is supplemental to NCHRP Research Report 1038: Update of Highway Capacity Manual: Merge, Diverge, and Weaving Methodologies.

See also: Highway Capacity Manual 7th Edition (2022).

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Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2023. Traffic Modeling Document. Washington, DC: The National Academies Press. https://doi.org/10.17226/27048.

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Publication Info

438 pages |  8.5 x 11 |  DOI: https://doi.org/10.17226/27048
Chapters skim
Front Matter i-iv
Introduction 1-3
Appendix A: Data Dictionary 4-9
Appendix B: Data Analysis Table 10-20
Appendix C: Speed-Flow Plots 21-56
Appendix D: Detailed Site Summaries 57-433

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