Machine Learning-Aided Management of Motorway Facilities Using Single-Vehicle Accident Data

Kaewunruen, Sakdirat; Alawad, Hamad Ali H; Omura, Takashi; Saito, Motoyasu

doi:10.4271/09-09-02-0007

Cited by 1 publication

(1 citation statement)

References 31 publications

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“…A more sustainable method to alleviate traffic congestion is to release the reserved capacity (RC) of existing facilities. Numerous studies have demonstrated that the capacity of existing facilities can be significantly improved using methods such as optimal geometric design [8], signal timing [9], traffic management [10,11], and maintenance considering risk profiles [12]. In recent years, the maturity and popularization of autonomous driving technology have provided a new perspective for improving the capacity of existing expressway facilities.…”

Section: Introductionmentioning

confidence: 99%

Autonomous Vehicles for Enhancing Expressway Capacity: A Dynamic Perspective

Liu

Wang

et al. 2022

Sustainability

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With rapidly developing communication and autonomous-driving technology, traffic flow on road networks will change from homogeneous human-driven vehicle (HDV) traffic flow to heterogeneous mixed traffic flow (MTF) comprising HDVs, autonomous vehicles (AVs), and connective-and-autonomous vehicles (CAVs). To understand the changes in the MTF of transportation engineering, we investigated the reserved capacity (RC) and right-of-way (ROW) reallocation policy that should be utilized under MTF scenarios. We established an MTF-based theoretical model to calculate the expressway segment capacity, theoretically analyzed the influence of the market penetration rate (MPR) on capacity and validated the model through numerical analysis. The results showed that the MPR of AVs and CAVs can enhance the MTF RC that is within 0–200% and that the platooning rate of CAVs positively influences the MTF RC. CAV popularization does not necessarily lead to a rapid increase in the transportation system efficiency when the MPR is <40% but significantly improves the efficiency of existing urban transportation facilities. When the MPR is >40%, the greatest enhancement is 4800 pcu/h/lane in terms of RC. A ROW reallocation policy that equips CAV-dedicated lanes according to the MPR of AVs and CAVs can enhance the capacity of expressway systems by 500 pcu/h/lane in terms of RC.

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