Macroscopic flow characterization at T-junctions

Transportation Research Interdisciplinary Perspectives

Khurram Shehzad Khattak¹  Waheed Imran²  Thomas Aaron Gulliver³  Zawar Hussain Khan⁴  Daud Khan⁵ 

[1] Corresponding author.;Department of Civil, Environmental and Architecture Engineering, the University of Naples, Federico II, Via Claudio 21, 80125, Italy;Department of Computer Systems Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan;Department of Electrical Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan;National Institute of Urban Infrastructure Planning, University of Engineering and Technology, Peshawar 25000, Pakistan;

关键词: Lighthill-Whitham-Richards model;    First order upwind scheme;    CFL condition;    Driver response;    Junctions;   

DOI  :  

来源: DOAJ

【 摘 要 】

At T-junctions, a minor road meets a main road and merging vehicles from the minor road create traffic bottlenecks as significant interactions between vehicles occur. These interactions reduce road capacity resulting in congestion. The Lighthill-Whitham-Richards (LWR) model is widely employed to characterize traffic flow. However, this model only considers small changes in flow which can be inadequate for T-junctions. Thus, a new model is proposed which is based on driver response during transitions at these junctions. The proposed and LWR models are evaluated using the first order upwind scheme (FOUS). The Courant-Friedrich-Lewy (CFL) condition is employed to ensure model stability. Results are presented which show that the proposed model better characterizes traffic flow at T-junctions.

【 授权许可】

Unknown