Optimal roundabout control under fully connected and automated vehicle environment

Autor: Ali Danesh, Wanjing Ma, Chunhui Yu, Ruochen Hao, Xiaolong Ma
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: IET Intelligent Transport Systems, Vol 15, Iss 11, Pp 1440-1453 (2021)
Druh dokumentu: article
ISSN: 1751-9578
1751-956X
DOI: 10.1049/itr2.12117
Popis: Abstract Roundabouts promise potential safety and efficiency benefits in the homogenous environment of conventional vehicles. However, their performance can deteriorate if high and/or imbalanced traffic exists. The advent of connected and automated vehicles (CAVs) has provided great opportunities to make transportation infrastructures more efficient. The purpose of this study is to develop a model to optimally control CAVs at roundabouts under a fully CAV environment. A two‐stage optimization model is proposed to optimize vehicle trajectories. At the first stage, a mixed‐integer linear programming model is formulated that optimizes vehicle arrival time at the roundabout. Then the optimal arrival time is fed to the second stage model to optimize vehicle trajectories, which is a non‐linear programming model. CAVs are guaranteed to pass the roundabout safely without stops. Simulation tests are carried out with different demand levels and turning ratios. To evaluate the performance of the proposed model, delay and throughput are compared with a conventional strategy in which the roundabout is controlled by the yielding rules. Sensitivity analysis is conducted to investigate the impact of control zone length and roundabout diameters. The results show the advantages of the proposed model in terms of delay and throughput in both high and imbalanced traffic.
Databáze: Directory of Open Access Journals
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