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PaulElAsmar_Thesis_Final_220106.pdf (5.89 MB)

ETD Abstract Container

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Empirical Study of the Fundamental Relationship – Exploring the Impact of Acceleration on the Fundamental Relationship

El Asmar, Paul
http://orcid.org/0000-0002-0604-1941
http://rave.ohiolink.edu/etdc/view?acc_num=osu1641465775861068

Abstract Details

2022, Master of Science, Ohio State University, Civil Engineering.
Much of traffic flow theory and traffic operation depends on a fundamental relationship, FR, between speed, flow and density. The FR defines the set of feasible traffic states. This work presents an empirical study of traffic dynamics on a freeway to explore factors that impact the FR. Conventional measures of the traffic state typically yield a very scattered cloud of data points in the flow-density plane. Under these conditions, many different FR curve shapes can be fit to the data with similar levels of "goodness of fit." Unfortunately, the different FR curve shapes yield very different dynamics. Prior work has shown that much of the scatter of conventional traffic state data arises from sampling errors, inhomogeneous vehicles being grouped together, and systematic dependencies on adjacent lanes. The present work goes further, exploring the impact of acceleration on the shape of the FR using a large database of loop detector data consisting of roughly 1.8 million vehicles. The findings show that acceleration indeed impacts the shape of the FR. When taking into account acceleration as a factor, two FR curves emerge: a deceleration FR curve and an acceleration FR curve, with the deceleration curve exhibiting higher flow than the acceleration curve for a given speed or density.
Benjamin Coifman (Advisor)
Andre Carrel (Committee Member)
Mark McCord (Committee Member)
63 p.
Civil Engineering

Recommended Citations

Citations

  • El Asmar, P. (2022). Empirical Study of the Fundamental Relationship – Exploring the Impact of Acceleration on the Fundamental Relationship [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1641465775861068

    APA Style (7th edition)

  • El Asmar, Paul. Empirical Study of the Fundamental Relationship – Exploring the Impact of Acceleration on the Fundamental Relationship. 2022. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1641465775861068.

    MLA Style (8th edition)

  • El Asmar, Paul. "Empirical Study of the Fundamental Relationship – Exploring the Impact of Acceleration on the Fundamental Relationship." Master's thesis, Ohio State University, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=osu1641465775861068

    Chicago Manual of Style (17th edition)

osu1641465775861068
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This open access ETD is published by The Ohio State University and OhioLINK.