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

Qixiu Cheng, Zhiyuan Liu, Yuqian Lin, Xuesong (Simon) Zhou

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)246-271
Number of pages26
JournalTransportation Research Part B: Methodological
Volume153
DOIs
StatePublished - Nov 2021
Externally publishedYes

Keywords

  • Car following model
  • S3 traffic flow model
  • Speed-density function
  • Traffic flow theory

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Transportation

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