International Symposium for Intelligent Transportation and Smart City (ITASC) 2017 Proceedings

Frontmatter

Combined PCA and NB to Predict Traffic Incident Duration

Abstract

An accurate prediction of incident duration plays an important role in obtaining traffic information for travelers timely and making appropriate decisions for traffic managers. As the characteristics are significantly different from each other, models were established for each type of incident, i.e. stopped-vehicle incidents, lost-load incidents and accidents. After data pretreatment, Principal component analysis (PCA) was carried out for each type of incident. Afterward, Naive Bayes (NB) model was applied for the data processed after PCA to predict incident durations. The experimental results indicated that the model obtained high prediction accuracy for those incidents which lasted less than 60 min and the prediction performance of accidents worked best. Besides, the prediction accuracy was 77.46%, 82.08% and 86.34% for each type of incident within 20 min’ error, respectively. In conclusion, the results showed that the combined model of PCA and NB is a promising application to predict incident duration.

Yechun Lao, Shuyan Chen, Ningning Song

Improve the Urban Basic Construction of Facilities and Guarantee the Urban Traffic Flow

The Research of Traffic-Nodes After Completing the In-Plane Four-Palace Type Expressway Networks

Abstract

This paper shows new-arisen traffic-nodes problems and the economic and social benefits brought from the Urumqi in-plane four-palace type expressway networks. It analyzes the present state of traffic-nodes, digs out the reasons for this. Furthermore, it brings up feasible solutions and scheme. It draws summary and reflection of the integrated traffic networks construction, and notes them down as valuable experience for the subsequent engineering. At last, I come up with thought and future planning of traffic management and organization.

Jianyong Fei

Speed Control of Pure Electric Vehicle Based on Adaptive Fuzzy PID Controller

Abstract

Adaptive speed control of pure electric vehicle (PEV) has been an answer to automotive automated control in a connected vehicle environment. In various traffic conditions, real-time speed adjustment is necessary. In this paper, an adaptive fuzzy proportional integral differential (PID) controller is set up and a relevant speed control system is modeled. The simulation results in MATLAB show a very good performance of the adaptive speed controller especially when PEV are required to accelerate or decelerate with a large range. It is indicated that this adaptive speed controller is adaptable to various speed requirements of traffic conditions.

Linghui Xu, Jia Lu, Jian Zhang

Designing a Dynamic Control Platform of Electric Bus Vehicles

Abstract

The dynamic control of bus vehicles can reduce the emergencies during the running time of the buses, such as bunching. Electric bus vehicle is one category of new energy vehicles which are environmentally friendly transportation means. A dynamic control platform of electric bus vehicles can make up the disadvantages of control strategies based on human experience. In this paper, we put forward such a platform to deal with the problem. The overall structure of the platform is proposed first, and four sub-systems are designed to implement the functions of data collection, storage, processing and releasing. The ways of data communication between inside and outside environment are illustrated based on the description of different kinds of data. Moreover, we design control strategies of the platform which mainly combine holding and skipping, and an example is given to explain the implements of the control strategies and the data processing sub-system.

Gang Zhong, Tingting Yin, Jian Zhang, Linchao Li

Research on Modern Tram Auxiliary Safety Protection Technology Based on Obstacles Detection

Abstract

Due to the special running environment, modern tram has the certain safety hazard in the running process, so this research proposed an auxiliary safety protection technology based on obstacle detection for the modern tram. By the detector obtaining information of anterior obstacles and coordinate matching to identify the location of obstacles and relative location of tram rail. For the obstacles in the range of tram rail, this research can calculate the distance between tram and obstacles, as well as compute train protection curve dynamically, therefore it can provide the warning information to the driver. Finally, the results of simulation experiments proved the validity of this research, and it can provide the dynamic protection information based on the detective data.

Gang Wang, Xiaoqing Zeng, Dong Bian, Weiyang Wang

Research on the Queue Length Prediction Model with Consideration for Stochastic Fluid

Abstract

Research on queue length model lacks the consideration for stochastic fluid. This paper makes equivalent queue length prediction models from two-fluid theory, considering that traffic flow is composed of road traffic and congested traffic. With the simulation in VISSIM, it proves the equivalent queue length prediction models in paper can quantitatively describe the existence of stochastic traffic fluid in road.

Xiaoqing Zeng, Jifei Zhan, Linxiang Yang, Qipeng Xiong, Yujia Chen

Research on the Model of Traffic Signal Control and Signal Coordinated Control

Abstract

This paper points to the shortfalls of the research on the traffic and signal coordinated control, and makes a model of traffic signal control and signal coordinated control. In the model, we use the minimum driving time as optimized object to adjust green signal ratio and pause rate in various intersections in real time, the green signal ratio is set as signal control strategy and the pause rate is taken as vehicle navigation strategy. The model is aim at coordinated control of the vehicles and signal. Also, this paper solves the model with the methods based on genetic algorithm (GA).

Xiaoqing Zeng, Chaoyang Wu, Yujia Chen, Qipeng Xiong, Cong Wei

Research on the Behavior of Routes Choice Under the Information Availability

Abstract

This paper is to study the routes choice under the influence of information and discuss the influence of information on the routes choice of travelers. It is based on the Logit model to construct the routes choice model under the influence of information and simulate after that. The simulation results show that the information has a great influence on the routes choice of travelers and prove that the model meet the requirement of accuracy.

Xiaofang Shan, Zheng Wang, Yingchang Zho

Research on Lateral Stability of Double Semitrailer Road Train

Abstract

Double semitrailer road train simulation model was established based on TruckSim in order to research the driving stability and improve combination vehicles performance. Tractor semitrailer simulation model was established as comparing model. Simulation of steady static circular test was carried out to research steering characteristic. Single lane change tests on double semitrailer road train and tractor semitrailer were also carried out to research lateral stability and the yaw rate, lateral acceleration and their rearward amplification (RA) was selected as evaluation index. The results shown that double semitrailer road train have appropriate deficiency steering characteristic and good driving stability. Apparently, it’s not as good as tractor semitrailer. The results serve as a useful reference for accelerating the popularization and application and promoting the development of vehicle industry technology .

Hao Zhang, Ze-kai Ren, Hong-wei Zhang, Chuan-jin Ou

Research on Lateral Stability of Center Axle Trailer Train

Abstract

Center axle trailer train simulation model was established by using TruckSim, in order to promote vehicle standardization and application. Simulation of single lane change test were carried out to research its driving stability. Driving stability test system of center axle trailer train has been set up for handling stability and lateral stability test. The correction and reliability of vehicle simulation model was verified by comparing the simulation and test results. Simulation model could reflect the behaviors of the center axle trailer train. The results can provide a model for the centre axle trailer train driving stability simulation and can provide technical guidance for vehicle performance research.

Hao Zhang, Ze-kai Ren, Hong-wei Zhang

Research on Road Adaptability of Center Axle Trailer Train

Abstract

Three different simulation models of center axle trailer train were established by using Auto TURN software, in order to research the passing stability and road adoptability. Highway ramp, first class highway and second class highway intersection models were established according to the requirement of JTG D20-2006. Research on road adaptability simulation of one 18.75 m long center axle trailer train and two 20.00 m long center axle trailer trains was carried out through the simulation models. The results show that three types of center axle trailer train have good adaptability in the highway ramp. At the intersection of first class highway, three vehicles can barely pass through, but in second class highway intersection, the swept path width of three vehicles is too wide, it is not recommended vehicle driving in this intersection. It found that the longer the vehicle, the worse the road passing ability. Simulation results serve as preferences for accelerating the deploying and optimizing the passing ability of center axle trailer train.

Hao Zhang, Ze-kai Ren, Hong-wei Zhang, Chao-zhi Huang

Nonlinear Modeling and Analyzing of Tractor-Semitrailer Driving Stability Based on Simulink

Abstract

In order to study how the nonlinear relationship between tire cornering force and sideslip angle affect the driving stability of tractor- semitrailer, mathematical model of tractor- semitrailer is established by using dynamics theory, and Simulink software is used to simulated analysis. Yaw velocity amplitude of tractor, lateral acceleration amplitude of tractor, yaw velocity amplitude of semitrailer and lateral acceleration amplitude of semitrailer are selected as evaluation indexes to analyze how the mass of semitrailer, fifth wheel lead and track width affect the driving stability of tractor- semitrailer. Simulation results show that it can improve the driving stability of tractor- semitrailer to reduce the mass of semitrailer and to increase fifth wheel lead and track width.

Chuan-jin Ou, Hong-wei Zhang, Hao Zhang

Optimal Location of Charging Station of Electric Bus in Battery Replacement Mode

Abstract

Electric vehicle charging mode determines the efficiency of electric vehicle charging, there are three charging modes-slow charging mode, fast charging mode and battery replacement mode. Electric bus (e-bus) is widely used in battery replacement mode. However, it is lack of theoretical guidance for the optimal locations of charging facilities for e-bus in battery replacement mode. In this paper, given the regional charging demand and considering the battery replacement mode, a mathematical model has been developed. Particle swarm optimization algorithm is proposed for solving this model. A case study on planning the locations of e-bus charging stations in Nanjing, China is presented. The results suggest that model can be used to locate e-bus charging station in battery replacement mode and provide reference for the optimal locations of charging facilities for e-bus.

Yi Xiang, Yong Zhang

Design and Development of Earthquake Emergency Rescue Command System Based on GIS and GPS

Abstract

The Earthquake is one of the worst natural disasters, emergency rescue command is playing an essential role in the process of rescue. And with the rapid development of GPS and GIS, the paper introduces GPS as the location technique and GIS to realize the visualization. Based on this, the system contains three structural layers and several basic functions, which can achieve the optimal path planning and real-time location through the heuristic algorithm and improved genetic algorithm. So this system can collect the information of earthquake emergency accurately and rapidly and provide effective service for earthquake emergency rescue command.

Yujia Chen, Xiaoqing Zeng, Tengfei Yuan

Analysis on the Role of Transport Equipment Standardization in the Development of Multimodal Transport

Abstract

As an intensive and efficient mode of transport organization, multimodal transport embodies the results of the comprehensive transport system and the overall level of the development of the logistics industry. Compared with the international advanced level, the development of multimodal transport in China is still in its initial stage, so that the standardization of transport equipment is more significant for the development of multimodal transport.

Xue-li Zhang, Chen Li, Chao-zhi Huang, Yi Xu

Analysis of Urban Resident Bus Travel Decision with Physical Expenditure

Abstract

With the improvement of living standard of urban residents recently, people are more and more attention to the comfortableness, convenience and environmental quality of travel. Therefore, the study of the variation of physiology and psychology during trip has become a hot topic in the traffic domain, while bus travel is more sensitive to them. Based on the above description, this study uses the heart rate test and SP survey to obtain the subjective and objective data of physical expenditure during the bus trip, and get the main factors of physical expenditure by analyzing the survey data. Then, by establishing the logistic regression model to analyze the relationship whether the relevant factors of physical expenditure are considered and the result show that the factors of physical expenditure can reduce the probability of bus travel choice.

Tengfei Yuan, Xiaoqing Zeng, Yujia Chen

Research on Optimal Control Strategy of Coupler Force in Urban Rail Transit

Abstract

In this paper the relationship between the coupler force and the traction force is analyzed, based on under two kinds of operating conditions: constant speed motion and constant force start motion, by establishing a multi-particle urban rail transit simulation model in the background of the Shenzhen Metro Line in order to optimize the coupling force between the trains. According to the simulation results of the coupler force, the standard of the evaluation of the coupler force is proposed and the reasonable control strategy of the train is obtained. In the meantime, two models of parallel experiments, rational traction force grouping and mathematical statistics were used to draw the experimental conclusion. Therefore, the validity of the simulation experiment is verified relying on train calculation and comparison of simulation results. Experimental results show that under the precondition of satisfy the standard of metro vehicle running, starting and accelerating the train in the constant force and constant speed operation, the optimal control strategy is not verifiable train traction evenly distributed control strategy. Meanwhile, the train optimal control mode can be obtained.

Feiyao Jing, Gang Xu, Ying Xu, Jianhao Shen, Cheng Chi, Yuan Liu

Effect of Brake Chamber Pressure Area on Dynamic and Static Braking Performance of Articulated Train

Abstract

The brake safety of articulated train is the focus of the road freight transport industry. Brake chamber is an important component of the brake system in articulated train, whose performance has a significant impact on the vehicle braking performance. In order to improve vehicle braking performance, the dynamic characteristics of the brake chamber with pressure change were analyzed based on the model of the brake chamber and the brake drum assembly. By changing different specifications of rear axles’ brake chamber in tractors, the static and dynamic braking performance were analyzed. The results showed that the larger the bearing area of brake chamber, the better the braking performance of articulated train. Proposed suggestions on how to select the specification of brake chamber in articulated train were made and the research results provided technical reference for the design of the articulated train braking system.

Jin-song Dong, Hong-wei Zhang, Hai-yan Ji, Cheng-qiang Zong, Jia-qi Yang

Standardization and Development of Road Freight Transport Vehicles

Abstract

The standard “Limits of dimensions, axle load and mass for motor vehicles, trailers and combination vehicles” is one of China’s basic technical standard for vehicle management, which regulated the vehicle’s dimensions, axle loads and mass limit. It is applicable to all motor vehicles, trailers and combination vehicles. In order to promote the use of new structures and new technologies in vehicle production, China’s vehicle management and standardization management departments jointly carried out the technical amendment to GB1589. The revised version of GB 1589 added the type of center axle trailer. It perfected the length, axle load and total mass limit of the vehicle. This standard built China’s road freight vehicle modular system and solved the problems of the inadaptability between vehicle width and pallet’s size, the mismatching between tractors and semi-trailers, etc.

Jinsong Dong, Hongwei Zhang, Zekai Ren, Chengqiang Zong

Driver’s License and Some Personal Factors on the Visual Impact of Hazard Identification

Abstract

The ability to identify hazards correctly is essential for safe driving. The purpose of this study is to analyze the driving licenses and personality factors on the impact of hazard identification. Twenty-five participants from Xi’an, China participated in the experiment and finished the simulated driving tasks as well personality factor tests (16PF scale related to personality factors). The Pearson correlation between simulated driving performance (dangerous scene recognition rate, dangerous scene identification time, scanning frequency and scanning angle) and 16PF scale score was calculated to obtain a consistent relationship between simulated driving task performance and 16PF scale scores. In the dangerous scene identification, the drivers with no license, high pressure, low stability and constancy often have low dangerous scene recognition rate and Hysteretic identification time. The results provide the basis of driver’s driving licenses and some personality factors effect in hazard identification, and explain the important effects of driving visual training and personality factors on safe driving.

Jian Sun, Jing-Shuai Yang, Dong Wang, Zhi-Zheng Ma, Peng-Zi Chu

The Research of Design Technology and Application on Permeable Sidewalk: A Technical Summary of Sponge City

Abstract

Permeable Sidewalk is an important measure to accelerate the “Sponge City” construction without substantial increase of construction costs. On the basis of existing research results, this paper concluded the classification and design indicators of permeable sidewalks by analyzing traditional sidewalks’ problems and their applicability. Then the Shanghai Expo Park and the Bund Channel are taken as examples for introducing the application of permeable sidewalks, which can provide references for promoting the “Sponge City” technology.

Hong Li, Yanfeng Bai, Ling Zhang

Digitalization and Application Research of BIM-Based Power Plants Lifecycle Information

Abstract

With the current Internet, cloud computing, big data, such as technology continues to progress, intelligent power plant construction is the future trend. As a base of intelligent power plant, the digitization and informatization construction are achieving good results on the application of part and point. But on the aspect of full life-cycle management, there are lack of depth research and practice on integration application to existing information, management of power plant construction, production, operations, etc. From the management angle of plant life cycle, the thesis brings the idea that establish panoramic, digital and smart power plant to realize controlling establishing investment, schedule, quality and establishing process data of power plant. Visualized operation and maintenance system of power plant would be realized with the base of three-dimension models of digital power plant in panoramic power plant, including equipment intelligent communication during operation and maintenance, Intelligent sense of equipment information collection, intelligent assessment and analysis of equipment status and so on, which can increase continuity and analytical of plant life cycle and realize digital and intelligent power plant. Meanwhile, the thesis suggests informationized master plan of power plant life cycle, which is to realize perceived reliability, virtual reconstruction, response instantly and business collaboration and management decision by uniformly planned and realized step by step with three levels of “panoramic power plant, digital power plant and intelligent power plant”.

Ling Su

Review on the Legal System of Unban Underground Space in China

Abstract

This paper summarizes and analyzes the current situation of urban underground space development and utilization, underground space right research, underground space registration system, and the characteristics of underground space utilization and the composition of rights system, and puts forward the legal system of underground space utilization in China, Spatial resources of the rational, orderly, efficient, coordinated development and utilization, which can be a reference for relevant works.

Yingjuan Qiao

Multi-Field Depth Vehicle Headlight Detection by Model Construction and Long Trajectory Extraction in Nighttime City Traffic

Abstract

Due to the limitation of headlights detection algorithm, obtained vehicles’ tracking trajectories are rather short in existing traffic surveillance systems. A novel vehicle tracking system is proposed in this paper to deal with nighttime traffic surveillance videos. It consists of three parts. An effective headlight detection model is firstly constructed based on the optical imaging principle, noises are then filtered out according to the field depth among the far, middle and near regions by different evaluations. Parallel perspective principle is secondly applied to remove the LED lights disturbance. The headlights are tracked and then paired according to vehicles’ type. Vehicles’ tracking is realized finally via trajectory feedback correction. Experiments are presented to show the proposed system’s superiority over several state-of-the-art methods in headlight detection, pairing and tracking.

Chunming Tang, Yancheng Dong, Xiangqing Lin, Wenna Xiao

A Game Theoretical Based QoS-Aware Routing Mechanism with IEEE802.16 Mesh Networks in ITS

Abstract

Traffic informationization is the embodiment of traffic modernization, networked and intelligentization. To speed up the development of ITS, developing public Travel Information Service system with Mobile Internet technique is a practical application. As the latest development trend, WMN containing a lot of research hotspots. The routing mechanism is one of the key technology to be considered in IEEE802.16 mesh networks. This paper proposed a game theoretical based QoS-aware routing mechanism (GTQR). The main idea of GTQR is to periodically record node’s congestion state and forecast mainstream type next period. Then GTQR directional send MSH-DSCH message to make path selection. GTQR sets a repeated game model to assess the advantage and disadvantage of path selection to optimize relaying strategy. Our simulation results demonstrate that GTQR performs better than other routing algorithms.

Jun Yu, Wei Zhang

Study on Durability of Railway Subgrade Structure Based on Indoor Sand-Blown Model Experiment

Abstract

Sandstorm erosion plays an important role in destroying the durability of structure of railway subgrade, so this research studies the mechanism and factors that sandstorm erosion erodes the railway subgrade structure in Northwest Loess Area through indoor sand-blow model experiment. The experiment uses the sand-blasting machine to produce the sand flow to erode the railway subgrade model which components is the improved loess, and simulates the sand erosion by controlling the velocity and time of sand flow. After completing the test, the research elaborates the impact of sand erosion on the durability of railway subgrade structure which provides certain theoretical guidance for the sandstorm prevention design and the control of the existed sandstorm disaster of railway in Loess Windy Area, according to measure the density, moisture content, quality and unconfined compression strength of the experimental models.

Hongdi Zhang

“Four-A-Services” Oriented Evaluated System of Intelligent City

Abstract

With the development of information technology, intelligent city has attracted extensive attention worldwide. Currently, there are various standards of intelligent city estimation. Since the construction of intelligent city is a complex program which contains many different science and technology areas, such as information technology, communication technology, control technology, sensor technology, and computer technology et al. These existing estimation systems set a great number of estimation factors to cover the areas as much as possible. In order to reduce the estimation factors, as well as estimate the developed status of intelligent city objectively and comprehensively, a “Four-A-Services” oriented evaluated system for intelligent city has been designed. This system estimates the Intelligent City based on Four factors which are “Anyone”, “Anytime”, “Anywhere”, and “Any Device” as well as tests the operation status of intelligent city in real-time so that the problems could be identified and solved in time.

Zhijie Li, Wei Zhang

Overview of Non-contact Pantograph-Catenary Arc Detection Based on Image Processing

Abstract

The pantograph-catenary system of high-speed EMU is the only way to get the power of high-speed trains. Pantograph-catenary arc fault is a kind of common fault of pantograph-catenary system, which brings fatal harm for train and becomes an important factor to hinder the stable operation of the train. The pantograph-catenary arc detection based on image processing can detect the state of pantograph-catenary system quickly, which can judge whether there is an arc in system and maintain the safety of train. Compared with the traditional detection method, it will be divided into infrared, ultraviolet and visible light accordance with the detection of the use of image information, which on the basis of summarizing all kinds of non-contact arc detection methods in recent years. The edge detection, threshold segmentation and other algorithms are summarized and the characteristics of pantograph-catenary arc are highlighted by using image enhancement technology. In view of the shortcomings of the existing non-contact pantograph-catenary arc detection, the future development is prospected.

Shize Huang, Fan Zhang, Liangliang Yu, Meiyu Pan

Research on the Arc Image Recognition Based on the Pantograph Videos of High-Speed Electric Multiple Unit (EMU)

Abstract

Pantograph-catenary system is a key component for transmitting the electric energy to the high-speed Electric Multiple Unit (EMU), and the arc on the pantograph-catenary affects directly the power supply quality and the train operation. Pantograph-catenary condition can be monitored by 6C-system, and extracting the information of arc image from vast videos automatically is difficult. In this study, a new approach has been proposed to get the image and occurrence time of the pantograph-catenary arc. The pantograph-catenary video is separated into continuous frame images, and converted into a discrete time series to analyze, by extracting the optical characters of the arc through image processing technique, and defining the ratio between the number of white and black pixels as arc coefficient. Due to the interference from weather, surroundings and operation routes, the arc parameter is fluctuated overtly. To eliminate this interference, a band-pass filter is used to process the spectrograms transformed by FFT in this paper, and the time domain graphs with the clear arc characters are acquired by IFFT, so that the pantograph-catenary arc can be accurately recognized. In the end the proposed method is demonstrated by a pantograph-catenary video of CRH380D as a case, and the pantograph-catenary arc image and arc occurrence time are correctly obtained.

Liangliang Yu, Shize Huang, Fan Zhang, Guanhua Li