An s-shaped three-parameter (S3) traffic stream model with consistent car following relationship

•Fundamental diagram over a wide range of possible traffic states.•S-shaped three-parameter (S3) traffic flow model.•Microscopic car-following model consistent with S3 model.•Calibration with real-world traffic data. In this study, a new s-shaped three-parameter (S3) traffic flow model is proposed t...

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Bibliographic Details
Published in:Transportation research. Part B: methodological 2021-11, Vol.153, p.246-271
Main Authors: Cheng, Qixiu, Liu, Zhiyuan, Lin, Yuqian, Zhou, Xuesong (Simon)
Format: Article
Language:English
Subjects:
Car following
Car following model
Flow-density-speed relationships
Macroscopic models
Parameters
S3 traffic flow model
Speed-density function
Traffic accidents & safety
Traffic flow
Traffic flow theory
Traffic information
Traffic models
Traffic speed
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Summary:•Fundamental diagram over a wide range of possible traffic states.•S-shaped three-parameter (S3) traffic flow model.•Microscopic car-following model consistent with S3 model.•Calibration with real-world traffic data. 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.
ISSN:0191-2615
1879-2367
DOI:10.1016/j.trb.2021.09.004