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 language | English |
|---|---|
| Pages (from-to) | 246-271 |
| Number of pages | 26 |
| Journal | Transportation Research Part B: Methodological |
| Volume | 153 |
| Early online date | 13 Oct 2021 |
| DOIs | |
| Publication status | Published - 1 Nov 2021 |
Bibliographical note
Funding Information:The authors would like to thank Prof. Daiheng Ni at University of Massachusetts Amherst, Prof. Rui Jiang at Beijing Jiaotong University, Prof. Xiqun Chen at Zhejiang University, Dr. Xianbiao Hu at Missouri University of Science and Technology, Dr. Wuping Xin at KLD Engineering, P.C. and Mr. Jeffrey Taylor at University of Utah for their discussions, as well as the editor and three anonymous reviewers for their constructive comments. The last author would like to thank Dr. David Hale at Leidos Inc. for his discussions related to FHWA Congestion and Bottleneck Identification Tool.
Publisher Copyright:
© 2021 Elsevier Ltd
Keywords
- Car following model
- S3 traffic flow model
- Speed-density function
- Traffic flow theory