Article
Economics
Lu Bai, S. C. Wong, Pengpeng Xu, Andy H. F. Chow, William H. K. Lam
Summary: This study establishes a stochastic link-based fundamental diagram considering the effects of speed heterogeneity and rainfall intensity on traffic flow. Real-world traffic data from Hong Kong in 2017 was used, and a two-stage calibration based on Bayesian inference was proposed, with results showing that the random-parameter model considering speed heterogeneity performed better.
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2021)
Article
Public, Environmental & Occupational Health
Zhuoyang Li, Shengnan Lin, Jia Rui, Yao Bai, Bin Deng, Qiuping Chen, Yuanzhao Zhu, Li Luo, Shanshan Yu, Weikang Liu, Shi Zhang, Yanhua Su, Benhua Zhao, Hao Zhang, Yi-Chen Chiang, Jianhua Liu, Kaiwei Luo, Tianmu Chen
Summary: This study compares and analyzes the application of the logistic differential equation (LDE) model and the generalized logistic differential equation (GLDE) model in infectious disease simulation. The results show that the GLDE model provides a more accurate fit to the data and can handle asymmetric data, while the LDE model is more advantageous in predicting the acceleration week of epidemics.
FRONTIERS IN PUBLIC HEALTH
(2022)
Article
Engineering, Civil
Pengqian Cao, Renxin Zhong, Wei Huang
Summary: Taxis are important in public transportation, but anomalies such as trip fraud can occur due to greedy drivers. This study proposes an anomalous trajectory detection method that combines route choice analysis and masked autoregressive flow, which effectively discovers anomalies and distinguishes intentional and unintentional ones.
JOURNAL OF ADVANCED TRANSPORTATION
(2022)
Article
Mathematics, Applied
Xiangmin Hu, Tao Chen, Kaifeng Deng, Guanning Wang
Summary: In this study, a velocity-based model for pedestrian movements containing two sub-models was proposed to investigate the influence of direction and speed selection strategies on pedestrian dynamics. Simulation results showed that these strategies affect the time and metabolic energy cost, density-velocity relations, and crowd stability of pedestrians.
Article
Physics, Fluids & Plasmas
A. Sai Venkata Ramana, Saif Eddin Jabari
Summary: Reaction times of drivers in heterogeneous traffic can significantly impact the formation of congestion at traffic signals while leaving the transition from free flow to congestion unaffected.
Article
Engineering, Civil
Xingju Wang, Rongqun Zhang, Yang Gou, Jiayu Liu, Lin Zhao, Yanting Li
Summary: This paper proposes a model for alleviating traffic congestion in freeway bottleneck areas using a variable speed limit control method in an intelligent connected environment. The results show that the VSL online control method in an intelligent connected environment has better control effect, especially with an increasing penetration rate of intelligent connected vehicles (ICV).
JOURNAL OF ADVANCED TRANSPORTATION
(2021)
Article
Engineering, Industrial
Yanghui Hu, Jun Zhang, Weiguo Song, Nikolai W. F. Bode
Summary: The study shows that social groups have an impact on pedestrian behavior and dynamics, with clear differences between social groups and individuals in terms of speed, overtaking frequency, and personal space. Therefore, the presence of social groups should be taken into consideration in safety management and modeling.
Article
Transportation Science & Technology
Isik Ilber Sirmatel, Mehmet Yildirimoglu
Summary: Controlling traffic in large-scale urban road networks is challenging. This paper proposes a method called average speed control, which manipulates regional speeds to achieve traffic control. Simulation results suggest that this method has the potential as an alternative or complementary actuation to perimeter control.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2023)
Article
Transportation Science & Technology
Jorge A. Laval
Summary: This paper presents additional results of the generalized bathtub model for urban networks, including a simpler derivation and exact solutions for uniformly distributed trip lengths. It is shown that the trip-based model is equivalent to the accumulation-based model in steady state, and that the trip-length distribution has only a transient effect on traffic dynamics. A queueing approximation method is proposed to compute the network accumulation variance and it is found that the accumulation variance is larger than predicted by traditional queueing models, indicating the nonlinear dynamics imposed by the macroscopic fundamental diagram. The system exhibits critical behavior near the capacity state where the accumulation variance diverges, suggesting the potential usefulness of tools from critical phenomena and phase transitions for understanding congestion in cities.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2023)
Article
Psychology, Multidisciplinary
Xue Wang, Jiwei Zhang, Jing Lu, Guanghui Cheng, Ningzhong Shi
Summary: This paper primarily analyzes the 1PGlogit model, which is a generalized model containing other one-parameter IRT models. The 1PGlogit model introduces a generalized link function that includes the probit, logit, and complementary log-log functions, allowing for more flexible fitting of data and achieving better performance. The paper provides simulation studies to validate parameter estimation accuracy, compares the 1PGlogit model with other IRT models, and demonstrates the model's good fitting performance using real data.
FRONTIERS IN PSYCHOLOGY
(2023)
Article
Astronomy & Astrophysics
Wei-bo He, Guo-yun Shao, Xue-yan Gao, Xin-ran Yang, Chong-long Xie
Summary: In this study, the speed of sound in QCD matter was systematically investigated using the PNJL model in the grand canonical ensemble. The results indicate that the speed of sound can be indicative of QCD phase transition and new features of sound velocity were discovered. Furthermore, the relations between differently defined sound velocity were formulated, providing useful conclusions for hydrodynamics simulation and calculation of transport coefficient of bulk viscosity.
Article
Green & Sustainable Science & Technology
Victor E. L. A. Duca, Thais C. O. Fonseca, Fernando L. Cyrino Oliveira
Summary: The study models wind speed using dynamic Weibull and Gamma state space models and derives filtering, smoothing, and prediction equations. Efficient simulation is achieved through the beta prime distribution for fast online wind speed forecasting. Results suggest that the dynamic Gamma model competes well with the Weibull model in wind speed prediction.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Engineering, Civil
Rebeka Yocum, Vikash V. Gayah
Summary: Recent studies have developed a coordinated traffic management scheme that implements perimeter flow control on an urban network and variable speed limits (VSL) on a freeway to reduce total travel time in a mixed network. VSL effectively meters traffic exiting the freeway into the urban network, improving overall system operations.
TRANSPORTATION RESEARCH RECORD
(2022)
Article
Green & Sustainable Science & Technology
Xianglun Mo, Xiaohong Jin, Jinpeng Tian, Zhushuai Shao, Gangqing Han
Summary: The macroscopic fundamental diagram (MFD) provides a method to evaluate macro traffic operation through micro traffic parameters and improve road network efficiency. This study proposes a graph theory-based MFD partition method to solve the problem of traffic network partition and improve road network balance.
Article
Engineering, Environmental
Congren Yang, Xianlai Zeng, Haodong Li, Zuyuan Tian, Wei Liu, Wenqing Qin, Jinhui Li
Summary: This study examines historical tin use in the US to understand future trends, finding that tin use goes through three stages as GDP per capita increases: increase-constant-decrease. While tin use globally and in China correlates with manufacturing sector value added, in the US it is negatively correlated. A sigmoid curve can fit US tin use data well, with changing use patterns driven by policies, economic restructuring, and new markets rather than limited resources.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Engineering, Civil
Peter J. Jin, Jia Li, Bin Ran
JOURNAL OF ADVANCED TRANSPORTATION
(2015)
Article
Economics
Jia Li, H. M. Zhang
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2015)
Article
Economics
Jia Li, H. Michael Zhang
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2015)
Article
Engineering, Civil
Amit Kumar Singh, Jia Li, Mike Murphy, C. Michael Walton
TRANSPORTATION RESEARCH RECORD
(2016)
Article
Economics
Zhen (Sean) Qian, Jia Li, Xiaopeng Li, Michael Zhang, Haizhong Wang
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2017)
Editorial Material
Engineering, Civil
Haizhong Wang, Daiheng Ni, Qian-Yong Chen, Jia Li
JOURNAL OF ADVANCED TRANSPORTATION
(2013)
Article
Computer Science, Interdisciplinary Applications
Jia Li, Haizhong Wang, Qian-Yong Chen, Daiheng Ni
MATHEMATICAL AND COMPUTER MODELLING
(2010)
Article
Economics
Jia Li, H. M. Zhang
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2013)
Article
Economics
Jia Li, H. M. Zhang
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2013)
Article
Engineering, Civil
Jia Li, H. Michael Zhang
TRANSPORTATION RESEARCH RECORD
(2011)
Article
Engineering, Civil
Jia Li, H. Michael Zhang
TRANSPORTATION RESEARCH RECORD
(2014)
Article
Transportation
Jia Li, Qian-Yong Chen, Haizhong Wang, Daiheng Ni
Article
Economics
Jia Li, Di Chen, Michael Zhang
Summary: This paper presents an equilibrium model of traffic flow with mixed autonomy based on the theory of two-player games. The study focuses on the interactions between human-driven and automated vehicles in both longitudinal and lateral dimensions. The model shows the existence of two types of Nash equilibria, one of which is always Pareto efficient. A speed policy is proposed to ensure that the realized equilibria are Pareto efficient in all traffic regimes. Two examples are provided to illustrate the applications of this model, including constructing flux functions based on behavior characteristics and considering lane policies in mixed autonomy traffic.
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2022)
Article
Engineering, Multidisciplinary
Jia Li, Yue-ping Xu
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A
(2010)
Article
Economics
Valeria Bernardo, Xavier Fageda, Jordi Teixido
Summary: The study finds that flight ticket taxes have a significant impact on low-cost airlines' supply and carbon emissions, resulting in a decrease of 12% in the number of flights and a 14% reduction in carbon emissions. Additionally, the burden of the taxes is higher for passengers paying low fares, affecting avoidable flights more significantly.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Xingxing Fu, Dea van Lierop, Dick Ettema
Summary: This study investigates the relationship between multimodality and perceived transport adequacy and accessibility. The results show that multimodality is burdensome, especially for car-dependent individuals, and leads to lower perceived achievement or accessibility for those with limited access to a car.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Henrik Johansson Rehn, Lars E. Olsson, Margareta Friman
Summary: This paper presents the Framework of RoUtIne Transitions in daily travel (FRUIT), which analyzes the impact of life events on travel behavior changes and identifies the critical phases in this process. By integrating theories and concepts, the framework provides a theoretical basis for interventions aimed at improving sustainable travel. The applicability of FRUIT is illustrated through an empirical case, and the implications for future research and policy are discussed.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Peng-Cheng Xu, Qing-Chang Lu, Chi Xie, Taesu Cheong
Summary: This study investigates the resilience evaluation of interdependent networks. A model is developed to quantify the impacts of network interdependency on the resilience of interdependent transit networks, considering interdependency relations, network topology, flow characteristics, and demand distribution. The model is applied to the metro and bus networks of Xi'an, China. Results show that node degree heterogeneity in topology, bidirectional function dependency among networks, and flow matching between networks are important factors influencing network resilience.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Jeppe Rich, James Fox
Summary: Many transport models allocate all costs to the car driver without considering the cost sharing among passengers. This paper questions this premise and argues that cost sharing can occur in various forms, which should be properly accounted for in transport models. The empirical evidence from Denmark suggests that not accounting for cost sharing may result in biased cost elasticities and occupancy rates.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Jorik Grolle, Barth Donners, Jan Anne Annema, Mark Duinkerken, Oded Cats
Summary: High-speed rail is considered a promising alternative for long-distance travel, but the current state of the European HSR network is poorly connected. This study presents a customized version of network design and frequency setting problem for HSR, and analyzes the performance under various policies and design variables. The results show that considering externalities leads to more extensive networks and mode shifts, but requires high public investments. The importance of network integration and cross-border cooperation is highlighted. The findings aim to contribute to the design of an attractive and competitive European HSR network.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Mounisai Siddartha Middela, Gitakrishnan Ramadurai
Summary: This study addresses the research gaps in understanding the effect of regression models, measurement period, and spatial dependence on Freight Trip Generation (FTG) modeling and freight-related policies. The results show that the spatial Zero-Inflated Negative Binomial (ZINB) model is the best for daily and weekly Freight Trip Production (FTP), while the non-spatial Negative Binomial (NB) model is the best for daily and weekly Freight Trip Attraction (FTA). The study also highlights the importance of considering spatial dependence and using count models with a week as the measurement period.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)