To investigate how setting up connected and automated vehicles (CAVs) dedicated lanes can maximize the traffic capacity, this article proposes a fundamental diagram of mixed traffic flow with CAVs dedicated lanes, in which CAVs dedicated lanes only allow CAVs and shared lanes allow both CAVs and human-driven vehicles (HDVs). First, for CAVs overflowing and not overflowing, the car-following (CF) modes and their proportion in CAVs dedicated lanes and shared lanes are analyzed, respectively. Second, based on steady-state conditions and average time headway, the fundamental diagram of mixed traffic flow with and without CAVs dedicated lanes is derived. Then, the relevant properties of the fundamental diagram with CAVs dedicated lanes are proposed and proved. Finally, multiple parameters, such as the overflow ratio of CAVs, the penetration rate of CAVs, and the number of CAVs dedicated lanes, are adopted to discuss their impact on the fundamental diagram. Results show that: 1) one and two CAVs dedicated lanes of three manual lanes can maximize the traffic capacity when the penetration rate of CAVs reaches 0.16 and 0.31, respectively; 2) compared with C-H policy, C-S policy can maximize the traffic capacity when the penetration rate of CAVs reaches 0.45 with one CAVs dedicated lane and 0.73 with two CAVs dedicated lanes; and 3) the traffic capacity of C-S policy is up to 1.3 times and 1.6 times that of mixed traffic flow with one and two CAVs dedicated lanes of three manual lanes, respectively. This work provides insights into the impact of CAVs dedicated lanes on traffic systems and helps decide the optimal number of dedicated lanes.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Fundamental Diagram of Mixed Traffic Flow Considering Dedicated and Shared Lanes Management Policies for CAVs


    Contributors:
    Yao, Zhihong (author) / Ren, Tingting (author) / Wang, Yi (author) / Xu, Zeqi (author) / Jiang, Yangsheng (author)


    Publication date :

    2024-09-01


    Size :

    4165520 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Travel time reliability-based optimization problem for CAVs dedicated lanes

    Tani, Ryuichi / Sumalee, Agachai / Uchida, Kenetsu | Taylor & Francis Verlag | 2022


    Impact of HDMap-based Dynamic Dedicated Lanes for CAVs in Urban Networks

    Ye, Shanding / Li, Tao / Li, Ruihang et al. | IEEE | 2023


    COALITION: CAVs-enabled Probabilistic Offloading of Congested Lanes for Reduced Urban Traffic Congestion

    Djahel, Soufiene / Hadjadj-Aoul, Yassine / Pincemin, Renan et al. | IEEE | 2023