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| 1 | Research progress and development trends of highway tunnels in China显示文摘The highway tunnel system in China has in recent years surpassed Europe,the United States,and other developed countries in terms of mileage,scale,complexity,and technical achievement.Much scientific research has been conducted,and the results have greatly facilitated the rapid development of China's highway tunnel building capacity.This article presents the historical development of highway tunneling in China,according to specific characteristics based on construction and operation.It provides a systematic analysis of the major achievements and challenges with respect to construction techniques,operation,monitoring,repair,and maintenance.Together with future trends of highway tunneling in China,suggestions have been made for further research,and development prospects have been identified with the aim of laying the foundation for a Chinese-style highway tunnel construction method and technical architecture. | Chuan He Bo Wang | 2013 | Journal of Modern Transportation2013，21，4： | 64 |
| 2 | Caltrans use of scrap tires in asphalt rubber products:a comprehensive review显示文摘The California Department of Transportation(Caltrans) has been using scrap tire rubber in asphalt pavements since the 1970 s in chip seals and the 1980 s in rubberized hot mix asphalt(RHMA).Both the wet(field blend) and dry processes were used in early trials.Caltrans has also used rubber modified binders containing both crumb rubber modifier and polymer modifier that could be manufactured at a refinery facility,a terminal blend wet process.Since the beginning of this century,Caltrans increased the use of scrap tire rubber in paving projects and invested considerable resources in developing technically sound,cost effective,and environmentally friendly strategies for using scrap tire rubber in roadway applications.By the end of year 2010,approximately 31%of all hot mix asphalt(HMA) placed by Caltrans was rubberized HMA,roughly 1.2 million tons.Caltrans efforts in using asphalt rubber products were also demonstrated in its research and technology development.These included the construction of two full-scale field experiments,five warranty projects,and an accelerated pavement study using a heavy vehicle simulator.Additionally,terminal blend asphalt rubber and rubberized warm mix asphalts began to be experimented on trial basis.This paper provides a comprehensive review of Caltrans experience over four decades with asphalt rubber products.Current practices and future outlook are also discussed. | Haiping Zhou Sri Holikatti Peter Vacura | 2014 | Journal of Traffic and Transportation Engineering(English Edition)2014，1，1： | 32 |
| 3 | An improved algorithm for fluid-structure interaction of high-speed trains under crosswind显示文摘Based on the train-track coupling dynamics and high-speed train aerodynamics,this paper deals with an improved algorithm for fluid-structure interaction of high-speed trains.In the algorithm,the data communication between fluid solver and structure solver is avoided by inserting the program of train-track coupling dynamics into fluid dynamics program,and the relaxation factor concerning the load boundary of the fluid-structure interface is introduced to improve the fluctuation and convergence of aerodynamic forces.With this method,the fluid-structure dynamics of a highspeed train are simulated under the condition that the velocity of crosswind is 13.8 m/s and the train speed is 350 km/h.When the relaxation factor equals 0.5,the fluctuation of aerodynamic forces is lower and its convergence is faster than in other cases.The side force and lateral displacement of the head train are compared between off-line simulation and co-simulation.Simulation results show that the fluid-structure interaction has a significant influence on the aerodynamics and attitude of the head train under crosswind conditions.In addition,the security indexes of the head train worsen after the fluid-structure interaction calculation.Therefore,the fluid-structure interaction calculation is necessary for high-speed trains. | Tian LI Jiye ZHANG Weihua ZHANG | 2011 | Journal of Modern Transportation2011，19，2： | 29 |
| 4 | Three-dimensional modeling and simulation of asphalt concrete mixtures based on X-ray CT microstructure images显示文摘X-ray CT(computed tomography) was used to scan asphalt mixture specimen to obtain high resolution continuous cross-section images and the meso-structure.According to the theory of three-dimensional(3D) reconstruction,the 3D reconstruction algorithm was investigated in this paper.The key to the reconstruction technique is the acquisition of the voxel positions and the relationship between the pixel element and node.Three-dimensional numerical model of asphalt mixture specimen was created by a self-developed program.A splitting test was conducted to predict the stress distributions of the asphalt mixture and verify the rationality of the 3D model. | Hainian Wang Zhihan Huang Lei Li Zhanping You Yu Chen | 2014 | Journal of Traffic and Transportation Engineering(English Edition)2014，1，1： | 30 |
| 5 | Evacuated tube transport technologies (ET3)^(tm):a maximum value global transportation network for passengers and cargo显示文摘Evacuated Tube Transport Technologies(ET3) offers the potential for more than an order of magnitude improvement in transportation efficiency,speed,cost,and effectiveness.An ET3 network may be optimized to sustainably displace most global transportation by car,ship,truck,train,and jet aircraft.To do this,ET3 standards should adhere to certain key principals:maximum value through efficiency,reliability,and simplicity;equal consideration for passenger and cargo loads;optimum size;high speed/high frequency operation;demand oriented;random accessibility;scalability;high granularity;automated control;full speed passive switching;open standards of implementation;and maximum use of existing capacities,materials,and processes. | Daryl OSTER Masayuki KUMADA Yaoping ZHANG | 2011 | Journal of Modern Transportation2011，19，1： | 25 |
| 6 | Behavior of composite rigid frame bridge under bi-directional seismic excitations显示文摘Pushover analysis and time history analysis are conducted to explore the bi-directional seismic behavior of composite steel-concrete rigid frame bridge,which is composed of RC piers and steel-concrete composite girders.Both longitudinal and transverse directions excitations are investigated using OpenSees.Firstly,the applicability of pushover analysis based on the fundamental mode is discussed.Secondly,an improved pushover analysis method considering the contribution of higher modes is proposed,and the applicability on composite rigid frame bridges under bi-directional earthquake is verified.Based on this method,an approach to predict the displacement responses of composite rigid frame bridge under random bi-directional seismic excitations by revising the elasto-plastic demand curve is also proposed.It is observed that the developed method yield a good estimate on the responses of composite rigid frame bridges under bi-directional seismic excitations. | Xiaogang Liu Jiansheng Fan Jianguo Nie Guo Li | 2014 | Journal of Traffic and Transportation Engineering(English Edition)2014，1，1： | 22 |
| 7 | Numerical simulation and analysis of aerodynamic drag on a subsonic train in evacuated tube transportation显示文摘The aerodynamic drag on a train running in an evacuated tube varies with tube air pressure,train speed and shape,as well as blockage ratio.This paper uses numerical simulations to study the effects of different factors on the aerodynamic drag of a train running at subsonic speed in an evacuated tube.Firstly,we present the assumption of a steady state,two dimensional,incompressible viscous flow with lubricity wall conditions.Subsequently,based on the Navier-Stokes equation and the k-ε turbulent models,we calculate the aerodynamic drag imposed on the column train with a 3-meter diameter running under different pressure and blockage ratio conditions in an evacuated tube transportation (ETT) system.The simulation is performed with FLUENT 6.3 software package.An analyses of the simulation results suggest that the blockage ratio for ETT should be in the range of 0.25-0.7,and the tube internal diameter in the range of 2-4 m,with the feasible vacuum pressure in the range of 1-10 000 Pa for the future subsonic ETT trains. | Yaoping ZHANG | 2012 | Journal of Modern Transportation2012，20，1： | 18 |
| 8 | Elements of automated survey of pavements and a 3D methodology显示文摘Sound transportation infrastructure is critical for economic development and sustainability.Pavement condition is a primary concern among agencies of the roadway infrastructure.Automation has become possible in recent years on collecting data and producing results for certain aspects of pavement performance,while challenges remain in several other categories,such as automated cracking survey.This paper reviews the technological advances on automated survey of pavements,and discusses the most recent breakthroughs by the team led by the author in using 3D laser imaging for capturing 1 mm surface images of pavements. | Kelvin C.P.WANG | 2011 | Journal of Modern Transportation2011，19，1： | 17 |
| 9 | Laboratory investigation on the properties of asphalt mixtures modified with double-adding admixtures and sensitivity analysis显示文摘In order to improve the high temperature stability and low temperature cracking resistance of asphalt mixtures,two varieties of admixtures(anti-rutting agent and lignin fiber) were selected and then combined.This is called double-mixture technology.A series of tests about pavement performance of base asphalt mixtures and asphalt mixtures with admixture of anti-rutting agent or lignin fiber were conducted.Meanwhile sensitivity analyses were used to study the influence of three factors(i.e.,asphalt grade,aggregate type and gradation) on the high and low temperature performance and water stability of said asphalt mixtures.Test results indicated that the dynamic stability,residual stability,TSR and low temperature failure strain of asphalt mixtures have increased significantly with the additions of 0.40% anti-rutting agent and 0.36% lignin fiber.These results show that the high and low temperature and water stabilities of asphalt mixtures improve obviously.This supports the beneficial comprehensive effect of the double admixture.The problem of improving the asphalt mixtures performance with a single admixture is solved,in addition to also improving other pavement performance.Based on the sensitivity analysis,the most influential factors of dynamic stability,low temperature failure strain and TSR are the gradation,followed by asphalt grade and aggregate type. | Zhen Fu Yanni Dang Bo Guo Yue Huang | 2016 | Journal of Traffic and Transportation Engineering(English Edition)2016，3，5： | 17 |
| 10 | Advances in design theories of high-speed railway ballastless tracks显示文摘The design theories of the ballastless track in the world are reviewed in comparison with the innovative research achievements of high-speed railway ballastless track in China.The calculation methods and parameters concerning train load,thermal effect,and foundation deformation of high-speed railway ballastless track,together with the structural design methods are summarized.Finally,some suggestions on the future work are provided. | Xueyi LIU Pingrui ZHAO Feng DAI | 2011 | Journal of Modern Transportation2011，19，3： | 16 |
| 11 | A dissipated energy comparison to evaluate fatigue resistance using 2-point bending显示文摘Fatigue is the main failure mode in pavement engineering.Typically,micro-cracks originate at the bottom of asphalt concrete layer due to horizontal tensile strains.Micro-cracks start to propagate towards the upper layers under repeated loading which can lead to pavement failure.Different methods are usually used to describe fatigue behavior in asphalt materials such as:phenomenological approach,fracture mechanics approach and dissipated energy approach.This paper presents a comparison of fatigue resistances calculated for different dissipated energy models using 2-point bending(2PB) at IFSTTAR in Nantes.2PB tests have been undertaken under different loading and environmental conditions in order to evaluate the properties of the mixtures(stiffness,dissipated energy,fatigue life and healing effect). | Cinzia Maggiore Gordon Airey Paul Marsac | 2014 | Journal of Traffic and Transportation Engineering(English Edition)2014，1，1： | 16 |
| 12 | Multi-state supernetworks:recent progress and prospects显示文摘Supernetworks have long been adopted to address multi-dimensional choice problems,which are thorny to solve for classic singular networks.Originated from combining transport mode and route choice into a multi-modal network,supernetworks have been extended into multi-state networks to include activity-travel scheduling,centered around activity-based models of travel demand.A key feature of the network extensions is that multiple choice facets pertaining to conducting a full activity program can be modeled in a consistent and integrative fashion.Thus,interdependencies and constraints between related choice facets can be readily captured.Given this advantage of integrity,the modeling of supernetwork has become an emerging topic in transportation research.This paper summarizes the recent progress in modeling multi-state supernetworks and discusses future prospects. | Feixiong Liao Theo Arentze Harry Timmermans | 2014 | Journal of Traffic and Transportation Engineering(English Edition)2014，1，1： | 16 |
| 13 | Temperature action and effect of concrete-filled steel tubular bridges:A review显示文摘Concrete-filled steel tube(CFST)has been widely applied in bridges due to its excellent structural and constructional performance.In CFST bridges,temperature action is not only an important but also a special load that must be considered in bridge design,construction and structural evaluation.This paper presents an overview on current researches of the temperature action and effect of CFST bridges.The historical and spatial characteristics as well as corresponding influencing factors of temperature distributions are summarized,and classifications of temperature actions are also reviewed.Results show that in-depth investigations of the contributions of temperature influencing factors can help to effectively reduce the adverse temperature effects on CFST bridges in the design stage.Due to the lack of long-term measurements and insufficient use of historical meteorological data,research on the representative value along with correlation analysis of CFST temperature actions and meteorological parameters have to be further carried out.In the meanwhile,a decomposition method of temperature distribution is proposed based on structural effects of CFST bridges in this paper.The decomposed temperature actions can be used for more accurate effect calculation than traditional temperature action classification method,especially for CFST truss bridges.At last,specific temperature action patterns still need to be investigated in some of the special problems,such as longitudinal temperature differences along the CFST arch rib and thermal debonding in the CFST interface.Further investigations are required on the accurate simulation of temperature distribution of CFST bridges considering the shading effects of components and terrain. | Jiang Liu Yongjian Liu Chenyu Zhang Qiuhong Zhao Yi Lyu Lei Jiang | 2020 | Journal of Traffic and Transportation Engineering(English Edition)2020，7，2： | 15 |
| 14 | Analysis of vibration reduction characteristics and applicability of steel-spring floating-slab track显示文摘A coupled dynamics computation model for metro vehicles,along with a steel-spring floating-slab track,is developed based on the theory of vehicle-track coupled dynamics.Using the developed model,the influences of the thickness,length and mass of floating-slab,spring rate and its arrangement space,running speed,etc.on the time and frequency domain characteristics of steel-spring fulcrum force are analyzed.The applicability of steel-spring floating-slab track is discussed through two integrated example cases of metro and buildings possessing distinct natural vibra-tion characteristics.It is concluded that,it is quite significant,in the optimization modular design of the parameters of steel-spring floating-slab track,to take the matching relationship of both the amplitude-frequency characteristics of steel-spring fulcrum force and natural vibration characteristics of integrated structures into comprehensive considera-tion.In this way the expensive steel-spring floating-slab track can be economically and efficiently utilized according to the site condition,and at the same time,the economic losses and bad social impact resulted from the resonance during usage of steel-spring floating-slab track can be avoided. | Wanming ZHAI Peng XU Kai WEI | 2011 | Journal of Modern Transportation2011，19，4： | 14 |
| 15 | Autonomous vehicles: challenges, opportunities, and future implications for transportation policies显示文摘This study investigates the challenges and opportunities pertaining to transportation policies that may arise as a result of emerging autonomous vehicle(AV)technologies. AV technologies can decrease the transportation cost and increase accessibility to low-income households and persons with mobility issues. This emerging technology also has far-reaching applications and implications beyond all current expectations. This paper provides a comprehensive review of the relevant literature and explores a broad spectrum of issues from safety to machine ethics. An indispensable part of a prospective AV development is communication over cars and infrastructure(connected vehicles). A major knowledge gap exists in AVtechnology with respect to routing behaviors. Connectedvehicle technology provides a great opportunity to implement an efficient and intelligent routing system. To this end, we propose a conceptual navigation model based on a fleet of AVs that are centrally dispatched over a network seeking system optimization. This study contributes to the literature on two fronts:(i) it attempts to shed light on future opportunities as well as possible hurdles associated with AV technology; and(ii) it conceptualizes a navigation model for the AV which leads to highly efficient traffic circulations. | Saeed Asadi Bagloee Madjid Tavana Mohsen Asadi Tracey Oliver | 2016 | Journal of Modern Transportation2016，24，4： | 14 |
| 16 | Lane departure warning systems and lane line detection methods based on image processing and semantic segmentation:A review显示文摘Recently,the development and application of lane line departure warning systems have been in the market.For any of the systems,the key part of lane line tracking,lane line identification,or lane line departure warning is whether it can accurately and quickly detect lane lines.Since 1990 s,they have been studied and implemented for the situations defined by the good viewing conditions and the clear lane markings on road.After then,the accuracy for particular situations,the robustness for a wide range of scenarios,time efficiency and integration into higher-order tasks define visual lane line detection and tracking as a continuing research subject.At present,these kinds of lane marking line detection methods based on machine vision and image processing can be divided into two categories:the traditional image processing and semantic segmentation(includes deep learning)methods.The former mainly involves feature-based and model-based steps,and which can be classified into similarity-and discontinuity-based ones;and the model-based step includes different parametric straight line,curve or pattern models.The semantic segmentation includes different machine learning,neural network and deep learning methods,which is the new trend for the research and application of lane line departure warning systems.This paper describes and analyzes the lane line departure warning systems,image processing algorithms and semantic segmentation methods for lane line detection. | Weiwei Chen Weixing Wang Kevin Wang Zhaoying Li Huan Li Sheng Liu | 2020 | Journal of Traffic and Transportation Engineering(English Edition)2020，7，6： | 14 |
| 17 | Lattice-Valued Proposition Logic(Ⅱ)显示文摘Lattice-ValuedPropositionLogic(Ⅱ)QinKeyun;XuYang(Dept.ofAppl.Mathematics,SouthwestJiaotongUniversity)Chengdu610031,ChinaLatti... | Qin Keyun Xu Yang( Dept. of Appl. Mathematics, Southwest Jiaotong University)Chengdu 610031,China | 1994 | Journal of Modern Transportation1994，11，1： | 13 |
| 18 | Key vacuum technology issues to be solved in evacuated tube transportation显示文摘Evacuated tube transportation(ETT) will be one of the ultra-large-scale vacuum application areas.This paper lists some key vacuum technology issues in ETT:(1) how to construct ultra-large-scale vacuum chamber with lower cost and high reliability,(2) how to evacuate gas out of the ETT tube in short time,(3) how to release heat or reduce temperature in the vacuum tube,(4) how to avoid vacuum discharge,(5) how to make vehicles with airproof shells and life support system,and(6) how to detect leaks and find leak positions efficiently.At the same time,some solutions are proposed. | Yaoping ZHANG Daryl OSTER Masayuki KUMADA Jianye YU Shengshan LI | 2011 | Journal of Modern Transportation2011，19，2： | 13 |
| 19 | Evaluation of pedestrian mid-block road crossing behaviour using artificial neural network显示文摘Pedestrians usually cross the road at mid-block locations in India because of the ease and convenience to reach their destination as compared to intersection locations.It is important to evaluate the pedestrian gap acceptance behavior at mid-block locations because of inadequate vehicular gaps under mixed traffic condition,which translates into the pedestrian road crossing behavior.The present study examines the pedestrian gap acceptance behaviour by employing an artificial neural network(ANN) model for understanding the decision making process of pedestrians,i.e.,acceptance or rejection of vehicular gaps at a mid-block location.From the results it has been found that the pedestrian rolling gap,frequency of attempt,vehicular gap size,pedestrian speed change condition and vehicle speed have major role in pedestrian gap acceptance.These results can lead to a better design of pedestrian crossing facilities where adequate gaps are not available in vehicular flow at mid-block crosswalk locations. | B Raghuram Kadali Nivedan Rathi Vedagiri Perumal | 2014 | Journal of Traffic and Transportation Engineering(English Edition)2014，1，2： | 13 |
| 20 | Progress on wheel-rail dynamic performance of railway curve negotiation显示文摘Recent advances on wheel-rail dynamic performance of curve negotiation are reviewed in this paper.There are four issues,the mechanism and calculation method of curve negotiation,the analysis and assessment of dynamic performance of vehicle,the effect of vehicle parameters on dynamic performance,and the influence of railway parameters on dynamic performance.The promising future development of wheel-rail coupled dynamics theory is analyzed in the research of curve negotiation.The framework and technique matching performance of wheel-rail dynamic interaction on the curved track are put forward for modern railways.In addition,the application of performance matching technique is introduced to the dynamic engineering,in which the wheel load is reduced obviously when the speed of train is raised to 200-250 km/h. | Kaiyun Wang Chao Huang Wanming Zhai Pengfei Liu Shen Wang | 2014 | Journal of Traffic and Transportation Engineering(English Edition)2014，1，3： | 13 |
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