Highlights The probability distribution of platoon size in mixed traffic flow is proposed based on the Markov chain. The capacity of mixed traffic flow considering the maximum platoon size of CAVs is derived. The stability of mixed traffic flow considering the maximum platoon size of CAVs is derived. Two safety evaluation metrics are adopted to analyze the impact of the maximum platoon size of CAVs on the traffic safety of mixed traffic flow. The fuel consumption and emissions are adopted to analyze the impact of the maximum platoon size of CAVs onmixed traffic flow.
Abstract This paper analyzes the characteristics of mixed traffic flow with maximum platoon size of connected automated vehicles (CAVs) based on analytical and simulation methods. First, we discuss the car-following and headway types of mixed traffic flows with human-driven vehicles (HDVs), connected human-driven vehicles (CHVs), automated vehicles (AVs), and CAVs. Second, the probability distribution of the CAVs platoon size is derived based on the Markov chain model. Subsequently, the capacity model and stability condition of mixed traffic flow are proposed based on the probability distribution of the CAVs platoon size, and some characteristics of the influence of the maximum platoon size on traffic capacity and stability are analyzed. A numerical experiment based on car-following models was conducted to investigate the effect of the maximum platoon size on capacity, stability, safety, fuel consumption, and emission of mixed traffic flow. The results show that (1) the capacity of mixed traffic flow increases with the maximum platoon size of CAVs; (2) the stability of mixed traffic flow deteriorates with the increase in the maximum platoon size of CAVs; (3) the safety risk of vehicles in mixed traffic flow increases with the maximum platoon size of CAVs; (4) the fuel consumption and emissions (e.g., CO, HC, and NOx) increase with the maximum platoon size of CAVs. This indicates that the larger maximum platoon size can only improve traffic capacity, which is not conducive to the stability, safety, fuel consumption, and emissions of mixed traffic flow.
Analysis of the impact of maximum platoon size of CAVs on mixed traffic flow: An analytical and simulation method
2022-12-10
Article (Journal)
Electronic Resource
English
Taylor & Francis Verlag | 2024
|IEEE | 2019