Journal
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
Volume 153, Issue -, Pages 246-271Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.trb.2021.09.004
Keywords
S3 traffic flow model; Traffic flow theory; Speed-density function; Car following model
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A new S3 traffic flow model was proposed in this study to represent the relationship between flow, speed, and density in highway traffic, which was calibrated using real-world traffic data. This study also derived a consistent car-following model based on the proposed S-shaped speed-density function.
In this study, a new s-shaped three-parameter (S3) traffic flow model is proposed to represent the relationships between three fundamental variables (i.e., flow, speed, and density) in highway traffic. An s-shaped speed-density function is proposed to capture the speed-density relationship under a wide range of possible densities. A consistent car-following model was derived in terms of the proposed s-shaped speed-density function. Both the S3 macroscopic model and the derived microscopic car-following model were calibrated using real-world traffic data.
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