Hierarchical Longitudinal Control for Connected and Automated Vehicles in Mixed Traffic on a Signalized Arterial

Xiao Xiao, Yunlong Zhang, Xiubin Bruce Wang, Shu Yang and Tianyi Chen
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Xiao Xiao: Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX 77840, USA
Yunlong Zhang: Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX 77840, USA
Xiubin Bruce Wang: Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX 77840, USA
Shu Yang: Department of Geography Information Systems, School of Transportation, Southeast University, Nanjing 210096, China
Tianyi Chen: Department of Civil and Environment Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA

Sustainability, 2021, vol. 13, issue 16, 1-17

Abstract: This paper proposes a two-layer hierarchical longitudinal control approach that optimizes travel time and trajectories along multiple intersections on an arterial under mixed traffic of connected automated vehicles (CAV) and human-driven vehicles (HV). The upper layer optimizes the travel time in an optimization loop, and the lower layer formulates a longitudinal controller to optimize the movement of CAVs in each block of an urban arterial by applying optimal control. Four scenarios are considered for optimal control based on the physical constraints of vehicles and the relationship between estimated arrival times and traffic signal timing. In each scenario, the estimated minimized travel time is systematically obtained from the upper layer. As the results indicate, the proposed method significantly improves the mobility of the signalized corridor with mixed traffic by minimizing stops and smoothing trajectories, and the travel time reduction is up to 29.33% compared to the baseline when no control is applied.

Keywords: consecutive signalized arterials; urban street; hierarchical longitudinal control; optimal control; connected and automated vehicles (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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