Article
Computer Science, Interdisciplinary Applications
Chengyuan Ma, Chunhui Yu, Cheng Zhang, Xiaoguang Yang
Summary: This study presents a signal timing model for isolated intersections in mixed traffic environments. The model considers both connected and human-driven vehicles (CHVs) and connected and automated vehicles (CAVs). Unlike previous studies, CAVs in this model perform self-organizing trajectory planning without external control. The proposed model is shown to effectively reduce vehicle delay and improve traffic throughput compared to benchmark and traditional signal control methods.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Chuan Ding, Rongjian Dai, Yue Fan, Zhao Zhang, Xinkai Wu
Summary: This study proposes a traffic signal optimization method based on connected and automated vehicle (CAV) technology, which jointly optimizes signal timings and lane settings to achieve efficient control of signalized intersections. The method overcomes the limitations of traditional signal cycle concept and allows for flexible adjustments of signal timings and lane resources based on dynamic traffic demands. Numerical simulation results demonstrate that this collaborative control approach outperforms fixed-time and signal optimization methods in reducing travel time under various traffic conditions.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2022)
Article
Engineering, Civil
Tanja Niels, Klaus Bogenberger, Markos Papageorgiou, Ioannis Papamichail
Summary: Traffic at busy urban intersections is currently coordinated using traffic signals. In the future, with fully connected automated vehicles, traffic signals could be replaced by vehicle-to-vehicle and vehicle-to-infrastructure communication. Recently, optimization-based autonomous intersection management (AIM) strategies have been developed, which can improve capacity and reduce delays compared to traditional traffic signal control (TSC). This paper introduces a signal-free vehicle control approach that integrates pedestrian signal phases into the optimization problem.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Transportation Science & Technology
Ehsan Amini, Aschkan Omidvar, Lily Elefteriadou
Summary: This research proposes mathematical models and algorithms for optimizing trajectories of connected and automated vehicles at freeway weaving segments, significantly improving traffic efficiency.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2021)
Article
Transportation Science & Technology
Panagiotis Typaldos, Markos Papageorgiou, Ioannis Papamichail
Summary: This article presents a path-planning algorithm for connected and non-connected automated road vehicles on multilane motorways. The algorithm utilizes real-time information exchange and short-term prediction to improve the efficiency of connected controlled vehicles in achieving their desired speed and improving the overall traffic flow.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2022)
Article
Engineering, Civil
Miao Yu, Jiancheng Long
Summary: This paper investigates the control problem of a signalized intersection in a partially connected automated vehicle environment. By adopting model predictive control, a real-time eco-driving strategy is proposed to optimize the control center's driving decisions and minimize fuel consumption.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Civil
Zongyuan Wu, Ben Waterson
Summary: This paper reviews the application of connected vehicles and autonomous vehicles in intersection infrastructure, as well as signal control and intersection management in different scenarios. The study summarizes optimization-based signal control methods and suggests future research directions that need attention.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Computer Science, Artificial Intelligence
Lecai Cai, Wenya Lv, Liyang Xiao, Ziheng Xu
Summary: Environmental protection and intelligence are inevitable trends in future transportation, with connected and automated vehicles (CAVs) expected to be applied soon. Scheduling CAVs to meet customer demands while minimizing carbon emissions has become a new green vehicle routing problem, considering vehicle speed as a key decision variable and different speed limits in various time periods and road types. This study formulates a nonlinear mixed-integer programming model and uses an outer-approximate method to linearize it, along with developing a hybrid particle swarm optimization (HPSO) algorithm to address the problem effectively. Extensive numerical experiments validate the proposed model's effectiveness and the efficiency of the solution method, drawing implications for reducing carbon emissions in logistics activities.
EXPERT SYSTEMS WITH APPLICATIONS
(2021)
Article
Engineering, Civil
Zhen Kang, Lianhua An, Jintao Lai, Xiaoguang Yang, Wensheng Sun
Summary: This paper proposes an eco-speed harmonization method at intersections to reduce carbon emissions. The method controls traffic and signal timing to achieve emission reduction, improved throughput, and reduced stop frequency. The proposed method outperforms other strategies under different demand levels and market penetration rates of connected and automated vehicles. It provides a foundation for future eco-approaching strategies based on connected and automated vehicles.
JOURNAL OF ADVANCED TRANSPORTATION
(2023)
Article
Automation & Control Systems
Ananda Babu, Tamizhselvan Kavitha, Rocio Perez de Prado, Bidare Divakarachari Parameshachari, Marcin Wozniak
Summary: Autonomous driving has gained significant interest in the past decade. Technological advancements have made automated driving more practical due to limitations in human driving abilities. The development of path planning for road vehicles is challenging, especially in ensuring passenger safety. A new method called Hunger Games improved Archimedes optimization (HGE-ARCO) has been proposed to optimize paths for better outcomes, achieving a top speed of 99 km/h.
IET CONTROL THEORY AND APPLICATIONS
(2023)
Article
Transportation Science & Technology
Handong Yao, Xiaopeng Li
Summary: This study focuses on trajectory smoothing for controlling CAVs in mixed traffic to reduce traffic oscillations, proposing a model that considers lane-change awareness and having superior performance in numerical experiments, providing additional benefits in overall system performance.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2021)
Article
Engineering, Civil
Bang-Kai Xiong, Rui Jiang
Summary: This paper aims to design speed advisory profiles for connected vehicles at isolated signalized intersections in mixed traffic flows. The benefits of fuel consumption and travel time increase with the market penetration rate of CVs, with maximum benefits achieved at the smallest value of alpha in undersaturated traffic. However, in oversaturated traffic, maximum benefits are achieved at intermediate alpha values, with decreasing sensitivity to alpha above 40%. Heterogeneity of drivers, inflows, tracking errors, and delays were also investigated for their impact.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Zhiyun Deng, Jiaxin Fan, Yanjun Shi, Weiming Shen
Summary: This paper proposes a coevolutionary algorithm to optimize longitudinal trajectories of multiple vehicles during the cooperative platoon formation process. The algorithm adopts an adaptive encoding scheme to represent trajectories and decomposes the high-dimensional problem into smaller subproblems. The experimental results indicate the superiority of the proposed approach in optimality and stability for real-life applications.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Ashkan Gholamhosseinian, Jochen Seitz
Summary: This paper provides a comprehensive survey on various intersection management methods for heterogeneous connected vehicles (CVs), including signalized, semi-autonomous, and autonomous intersections. It focuses on autonomous intersection management (AIM) and explores the robustness and resiliency of intersection management from different perspectives.
Article
Chemistry, Analytical
Chenghao Li, Zhiqun Hu, Zhaoming Lu, Xiangming Wen
Summary: The emerging CAV has the potential to improve traffic efficiency and safety by cooperating at intersections. However, perceptual errors may occur due to external conditions, and a trade-off between efficiency and safety needs to be considered in the presence of both CAVs and conventional vehicles. Data fusion schemes can improve overall traffic flow and energy efficiency at various CAV penetration rates.
Article
Engineering, Civil
Lin Liu, Shuo Feng, Yiheng Feng, Xichan Zhu, Henry X. Liu
Summary: This paper proposes a learning-based stochastic driving model for AV testing, which can reproduce trajectories more similar to human drivers and generate a naturalistic driving environment, showing significant importance for AV testing and evaluation.
TRANSPORTATION RESEARCH RECORD
(2022)
Article
Engineering, Civil
Shuo Feng, Yiheng Feng, Haowei Sun, Yi Zhang, Henry X. Liu
Summary: A customized testing scenario library for a specific CAV model is generated through an adaptive process to compensate for the performance dissimilarities and leverage each test of the CAV.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Civil
Shiqi Ou, Wanjing Ma, Chunhui Yu
Summary: A mixed-integer linear programming model is proposed in this study to optimize the scheduling of bus arrivals and the matching of bus berths at a curbside stop under the connected vehicle environment. The objective is to minimize bus delays weighted by the number of passengers, taking into consideration bus punctuality. Numerical studies validate the advantages of the proposed model in terms of weighted bus delays and bus punctuality.
JOURNAL OF ADVANCED TRANSPORTATION
(2022)
Article
Transportation Science & Technology
Xingmin Wang, Yafeng Yin, Yiheng Feng, Henry X. Liu
Summary: This study proposes a new framework for max pressure control using reinforcement learning algorithms, considering phase switching loss and optimizing parameters. Simulation results show that the proposed control method outperforms traditional max pressure control. This research is of great significance for real-world implementations.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2022)
Article
Engineering, Civil
Rusheng Zhang, Zhengxia Zou, Shengyin Shen, Henry X. Liu
Summary: This paper introduces a newly developed and deployed roadside cooperative perception system with an edge-cloud structure and multiple kinds of sensors. The performance of the system is analyzed using data collected from the field, and its potential in applications such as traffic volume monitoring and road safety warning is demonstrated.
TRANSPORTATION RESEARCH RECORD
(2022)
Article
Transportation Science & Technology
Jun Hua, Guangquan Lu, Henry X. Liu
Summary: This study establishes a driving behavior model framework to explain drivers' approaching behaviors to signalized intersections, and obtains probabilities and distributions through simulations. The results demonstrate the validity of the proposed model and its applicability to drivers with different desired risks.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2022)
Article
Engineering, Civil
Xingmin Wang, Zachary Jerome, Chenhao Zhang, Shengyin Shen, Vivek Vijaya Kumar, Henry X. Liu
Summary: This paper proposes a trajectory data processing pipeline for urban traffic network applications, which includes matching, splitting, and distance extraction steps, as well as smoothing and filtering algorithms to reduce noise and errors. The processed data is used to calculate various mobility performance indices for comprehensive evaluations. The proposed methods are efficient, robust, and scalable, and can be applied to large-scale urban traffic networks.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Computer Science, Interdisciplinary Applications
Chengyuan Ma, Chunhui Yu, Cheng Zhang, Xiaoguang Yang
Summary: This study presents a signal timing model for isolated intersections in mixed traffic environments. The model considers both connected and human-driven vehicles (CHVs) and connected and automated vehicles (CAVs). Unlike previous studies, CAVs in this model perform self-organizing trajectory planning without external control. The proposed model is shown to effectively reduce vehicle delay and improve traffic throughput compared to benchmark and traditional signal control methods.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Shuo Feng, Haowei Sun, Xintao Yan, Haojie Zhu, Zhengxia Zou, Shengyin Shen, Henry X. Liu
Summary: A critical bottleneck for autonomous vehicle development and deployment is the high costs required to validate safety in real-world driving. Researchers have developed an intelligent testing environment using AI-based agents to accelerate the safety validation process without bias. Their approach reduces testing time by orders of magnitude and can also be applied to other safety-critical autonomous systems.
Article
Engineering, Civil
Zhen Yang, Rusheng Zhang, Gaurav Pandey, Neda Masoud, Henry X. Liu
Summary: This work proposes a hierarchical vehicle behavior prediction framework that incorporates traffic signal information and models the interaction between vehicles. The framework predicts vehicle behaviors in two stages: discrete intention prediction and continuous trajectory prediction. It is designed to capture the difference among human drivers with parameterized driver characteristics.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Engineering, Civil
Zhen Yang, Jun Ying, Junjie Shen, Yiheng Feng, Qi Alfred Chen, Z. Morley Mao, Henry X. Liu
Summary: This paper proposes a method to detect GPS spoofing attacks on connected vehicles (CVs) and autonomous vehicles (AVs) using domain knowledge in transportation and vehicle engineering. A computational-efficient driving model is constructed by learning from historical trajectories, and a statistical method is developed to measure the dissimilarities between observed and predicted trajectories for anomaly detection. The proposed method is validated on real-world datasets and shown to detect almost all attacks with low false positive and false negative rates.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Transportation Science & Technology
Ruochen Hao, Yuxiao Zhang, Wanjing Ma, Chunhui Yu, Tuo Sun, Bart van Arem
Summary: With the development of internet of vehicles and automated driving, individual-based trajectory control at intersections becomes possible. This study proposes a mixed-integer linear programming (MILP) model to optimize vehicle trajectories at an isolated signal-free intersection without lane allocation, denoted as lane-allocation-free (LAF) control. Vehicle routes and trajectories at the intersection are optimized in one unified framework for system optimality in terms of total vehicle delay.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2023)
Article
Computer Science, Information Systems
Yujie Feng, Jiangtao Wang, Yasha Wang, Xu Chu
Summary: As a crucial part of public health system, population health monitoring plays a significant role in shaping health policies. However, the high cost of traditional data collection methods has led to the proposal of sparse-sampling-completion algorithms. Existing data-completion methods primarily focus on adjacent-spatial correlations, which may not accurately infer missing prevalence data in neighboring areas due to cost constraints. To address this problem, we propose a novel deep-learning-based prevalence inference model, SDA-GAIN (Spatial-attention and Demographic-augmented Generative Adversarial Imputation Network), which improves accuracy by learning health semantic space similarities between cross-space areas. SDA-GAIN utilizes a Transformer-based model to learn healthy semantic similarities and a GAN-based model for high-accuracy completion, with the addition of demographic data to enhance the model's ability in learning better health semantic representation through CNN. Extensive experiments demonstrate that SDA-GAIN outperforms other state-of-the-art approaches at low sampling rates (<30%), leading to significant cost savings. Moreover, the visualization of health semantic similarity learned by SDA-GAIN closely resembles real-life situations.
IEEE TRANSACTIONS ON BIG DATA
(2023)
Article
Engineering, Civil
Congjian Liu, Cheng Zhang, Chunhui Yu, Ke Chen, Zehao Jiang
Summary: An analysis framework was developed to optimize the longitudinal and lateral locations of autonomous-vehicle-dedicated lanes (AVDLs) on urban expressways. The framework includes a lane-level multiclass equilibrium assignment model and a 0-1 integer programming model, which determine the optimal deployment plan of AVDLs with minimal total travel time (TTT). Experimental results demonstrate that the proposed framework outperforms existing methods in terms of TTT reduction. Sensitivity analysis also confirms the robustness of the developed method in reducing TTT under different conditions.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Jingxuan Yang, Honglin He, Yi Zhang, Shuo Feng, Henry X. Liu
Summary: This paper proposes an adaptive testing method using sparse control variates, which evaluates the performance of CAVs by adaptively utilizing testing results. It reduces estimation variance by adjusting testing results based on multiple linear regression techniques and optimizes regression coefficients for the CAV under test. The method applies sparse control variates to critical variables of testing scenarios and has been validated in high-dimensional overtaking scenarios, achieving a 30 times acceleration in the evaluation process.
2022 IEEE 25TH INTERNATIONAL CONFERENCE ON INTELLIGENT TRANSPORTATION SYSTEMS (ITSC)
(2022)
Article
Economics
Songyot Kitthamkesorn, Anthony Chen, Seungkyu Ryu, Sathaporn Opasanon
Summary: The study introduces a new mathematical model to determine the optimal location of park-and-ride facilities, addressing the limitations of traditional models and considering factors such as route similarity and user heterogeneity.
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2024)