Showing papers in "Transport Standardization in 2009"
Journal Article•
TL;DR: Pore-measuring method and mercury intrusion method based on digital technology can detect the hole structure of concrete with the aim to ascertain the relationship between frost durability degradation of cement concrete and pore structure as mentioned in this paper.
Abstract: Pore-measuring method and mercury intrusion method based on digital technology can detect the hole structure of cement concrete with the aim to ascertain the relationship between frost durability degradation of cement concrete and pore structure. Meanwhile the influence of pore structure on the anti-frost performance is analyzed. The results show that additive like excellent air-entraining agent can obviously perfect the pore structure of cement concrete so that the anti-frost performance is heightened.
7 citations
Journal Article•
TL;DR: In this article, the development course of international pavement surface distress automatic survey system is expatiated in details, while representative detection equipments are introduced, meanwhile their shortages are pointed out.
Abstract: The development course of international pavement surface distress automatic survey system is expatiated in details. The representative detection equipments are introduced, meanwhile their shortages are pointed out. What’ s more, the development tendency of this technology is discussed. It can provide reference for the research and application of pavement surface distress automatic survey system.
6 citations
Journal Article•
TL;DR: Wang et al. as discussed by the authors introduced the curve of passenger flow volume by taking out historical data from Dalian public transit intelligent card database, and derived the daily transit peak value interval with Fisher sequence clustering method.
Abstract: By taking out historical data from Dalian public transit intelligent card database,the curve of passenger flow volume is introduced.With Fisher′ s sequence clustering method,the daily transit peak value interval is obtained.Then,a pointed passenger flow volume survey for transit peak value interval with typical characteristics is carried on to get data sample of practical passenger flow volume.By combining the passenger flow volume data based on the public transit intelligent card with which based on passenger flow survey,the regression equations for passenger flow volume forecasting in different cases of transit peak value interval are established in order to forecast the total passenger flow volume in different transit peak value intervals.
5 citations
Journal Article•
TL;DR: In this article, the difference between gap gradation and complete gap gradient is compared in mechanical properties of asphalt concrete, and it is shown that asphalt mixture with gap gradations is suitable for asphalt pavement of high-class highway.
Abstract: On the basis of lots of theories and experiment analysis,mechanical property and gradation characteristics of asphalt mixture with gap gradation are studied.Meanwhile,the differences between gap gradation and complete gap gradation are compared in mechanical property of asphalt concrete.Thus it is seen that asphalt mixture with gap gradation is suitable for asphalt pavement of high-class highway.
4 citations
Journal Article•
TL;DR: The fuzzy control model for urban traffic lights at single intersection is built from the perspective of cybernetics and has better control effect which reduces vehicle average delay at the single intersection.
Abstract: The fuzzy control model for urban traffic lights at single intersection is built from the perspective of cybernetics The modeling is designed by imitating the decision-making process of traffic policemen leading and unblocking traffic flow The specific control algorithm and fuzzy controller are introduced in detail afterward By using the Simulink tool in Matlab, the fuzzy control model is simulated and analyzed Comparing with the timed traffic lights control solution, the fuzzy control model has better control effect which reduces vehicle average delay at the single intersection
4 citations
Journal Article•
TL;DR: On the basis of resident travel utility maximization objective function, time value concept is introduced to establish passenger flow share rate disaggregating prediction model as discussed by the authors.The parameters in this model are calibrated through calculation.
Abstract: On the basis of resident travel utility maximization objective function,time value concept is introduced to establish passenger flow share rate disaggregating prediction model.The parameters in this model are calibrated through calculation.It has reference value for predicting urban rail transit passenger flow share rate.
4 citations
Journal Article•
TL;DR: In this paper, the meanings of transmission channels indexes defined in the standard and the impact of the indexes on the quality of video image are expatiated on, which has a certain of guidance meaning to understanding and implementing the standard.
Abstract: Through interpreting some items of "Highway Engineering Quality Test and Assessment Standard Volume 2 Electromechanical Engineering"(JTG F80/2-2004), which is an industry standard, the meanings of transmission channels indexes defined in the standard and the impact of the indexes on the quality of video image are expatiated on, which has a certain of guidance meaning to understanding and implementing the standard.
4 citations
Journal Article•
TL;DR: In this article, the relationship between visibility, glare strength, pavement brightness and response time of drivers was studied, and it was shown that response time increases with visibility and glare strength decreasing.
Abstract: Response time of drivers relies on the drivers' state and environment conditions. In allusion to drivers' response time state under the conditions of rain, fog, strong light and dark pavement, the relationship between visibility, glare strength, pavement brightness and response time of drivers are studied. The results show that response time of drivers increases with visibility, glare and brightness decreasing.
3 citations
Journal Article•
TL;DR: The measured data of curbside stop at Xietu road and bus bay at Huashan road in Shanghai is used to validate MTSS and the results indicate that the microscopic traffic simulation system M TSS may describe public transport vehicles movement as well as complex mutual influence between public transport Vehicles and other traffics.
Abstract: On the basis of the system structure and components function of the microscopic traffic simulation system MTSS, the measured data of curbside stop at Xietu road and bus bay at Huashan road in Shanghai is used to validate MTSS and get the results that the error between observed data and simulation data is within 10%. This indicates that the microscopic traffic simulation system MTSS may describe public transport vehicles movement as well as complex mutual influence between public transport vehicles and other traffics. What′s more, MTSS is applied to study the road traffic flow influenced by bus stop under different traffic conditions and these conclusions can provide the basis for the establishment of traffic flow.
3 citations
Journal Article•
TL;DR: The comprehensive evaluation index system, which is based on the four aspects like public traffic infrastructure level, service level, benefit level, social responsibility, can provide reference for urban traffic planning.
Abstract: The comprehensive evaluation of urban public traffic system is essential to scientific urban development.The comprehensive evaluation index system,which is based on the four aspects like public traffic infrastructure level,service level,benefit level,social responsibility,can provide reference for urban traffic planning.
3 citations
Journal Article•
TL;DR: In this article, the authors analyzed the container throughput capacity of port by using cubic exponential smoothing, GM(1,1) and combined forecast method, and the results showed that the combined forecast model obtains the best precision.
Abstract: According to the past data of port container throughput,the container throughput capacity of port is analyzed by using cubic exponential smoothing,GM(1,1) and combined forecast method,and the container throughputs are forecast in the next few years. The result shows that combined forecast model incorporates the advantages of the former methods,its mean absolute error,mean relative error are less than those when using cubic exponential smoothing or GM (1,1) respectively. Thus the combined forecast model obtains the best precision.
Journal Article•
TL;DR: Transit Oriented Development (TOD) is a strategy for urban development which is emerging, saves land resources and has high synthetical benefit.
Abstract: Transit Oriented Development(TOD) is a strategy for urban development which is emerging, saves land resources and has high synthetical benefit. As an important measure to implement urban sustainable development, TOD is a dominant way in many aspects such as releasing traffic pressure, improving living environment, and so on.
Journal Article•
TL;DR: Zhujiang Huangpu Bridge is established by Ansys, which is a large-scale finite element software, considering the interaction of pile-soil, and the model analysis are carried out, the dynamic characteristics are obtained.
Abstract: The model of Zhujiang Huangpu Bridge is established by Ansys, which is a large-scale finite element software, considering the interaction of pile-soil. Based on the model, the model analysis are carried out, the dynamic characteristics are obtained. Then longitudinal, lateral and vertical seismic response spectrum analysis as well as seismic history is carried out. Through the analysis, the anti-seismic performance is found out. The results show that the bridge can meet the anti-seismic demand. The result and analysis method can be used for reference by other similar bridge.
Journal Article•
TL;DR: The height of Chinese characters under different vision condition based on walking speed is put forward, which is of reference value for the design and application of static sign system of comprehensive passenger trans-port hub.
Abstract: Based on the study of the main influence factors of static sign system in comprehen-sive passenger transport hub,the main problems and design points of static sign system′s three ele-ments are discussed. The information content of static sign system are summarized. Furthermore the height of Chinese characters under different vision condition based on walking speed is put forward,as well as the apparent distance to signs with different height of Chinese characters,which is of reference value for the design and application of static sign system of comprehensive passenger trans-port hub.
Journal Article•
TL;DR: In this paper, the authors compared the logistics node location and route optimization based on minimum spanning tree and gravity model approach and showed that each model has its own characteristics and the minimum cost is obtained through VB program so as to optimize the logistics nodes in network.
Abstract: Logistics node location and route optimization is usually studied in logistics research.In general,the distance between two nodes is calculated by beeline or polygonal line about location model.On the basis of gravity model approach,some irrationalities are pointed out,so are the logistics node location and route optimization based on minimum spanning tree.The comparison of algorithms shows that each model has its own characteristics.The minimum cost is obtained through VB program so as to optimize the logistics node in network.
Journal Article•
TL;DR: In this paper, the authors analyzed the operational characteristic of vehicle and established its probability prediction model based upon the data of brake malfunction in many continuous downhill highways and showed that this model has excellent fitting degree and is safe, can predict effectively brake malfunction on a succession of downhill highway.
Abstract: Significant or deadly traffic accidents occur in a succession of downhill highways in mountainous regions with high frequencyIt analyzes the operational characteristic of vehicle and establishes its probability prediction model based upon the data of brake malfunction in many continuous downhill highwaysThe validation shows that this model has excellent fitting degree and is safe,can predict effectively brake malfunction on a succession of downhill highway
Journal Article•
TL;DR: In this article, the threshold condition at the different steering speed, steering radius, and the different road conditions is derived based on the rapid steering automobile cornering force analyzes The maximum allowable speed of automobile rapid steering without occurring side slip and side tumbling is presented
Abstract: When running on rapid steering condition, automobile tends to occur side slip and side tumbling under centrifugal force, the threshold condition at the different steering speed, steering radius, and the different road conditions is derived based on the rapid steering automobile cornering force analyzes The maximum allowable speed of automobile rapid steering without occurring side slip and side tumbling is presented It provides a theory foundation for study on safety and control of the automobile rapid steering
Journal Article•
TL;DR: The traffic blocking evaluation system on the basis of evaluation grade is used to evaluate the blocking situation at government intersection in Heilongjiang Province so as to further determine the degree of traffic blocking.
Abstract: About the traffic blocking at urban intersection, the traffic blocking evaluation system on the basis of evaluation grade is used to evaluate the blocking situation at government intersection in Heilongjiang Province so as to further determine the degree of traffic blocking. It can provide ref- erence for the management of traffic blocking, road programming and travel for the residents.
Journal Article•
TL;DR: Test theory of automobile′s brake trajectory and design of test system are researched and brake trajectory of each wheel can be tested at the same time to detect automobile″s brake distance, lateral displace-ment, course angle and other parameters.
Abstract: In order to improve the test result′s objectivity of automobile′s brake performance and solve the problem that one automobile′s bench test result is different from road test result, automobile′s brake performance test technology based on brake trajectory is advancedTest theory of automobile′s brake trajectory and design of test system are researchedUsing this method, brake trajectory of each wheel can be tested at the same time to detect automobile′s brake distance, lateral displace-ment, course angle and other parameters
Journal Article•
TL;DR: The whole execute flow of mentioned algorithm is given, and several key techniques such as the generation algorithm for discrete potential field and the polish method for discrete path are explained in detail.
Abstract: Path planning for pedestrian in complex 2D scenario is important technique serving for microscopic simulation. A path planning algorithm is provided based on discrete potential field. The whole execute flow of mentioned algorithm is given, and several key techniques such as the generation algorithm for discrete potential field and the polish method for discrete path are explained in detail. Finally, numerical examples are given to demonstrate the feasibility of the developed algorithm and its objective limitation for application is pointed out.
Journal Article•
TL;DR: A new kind of GPS guidance system has been developed that can offer the smooth guidance route of short time, combining with electronic map and localization system, which can improve the vehicle movement quality and alleviate traffic jam to some extent.
Abstract: On the basis of analyzing operation principle as well as advantages and disadvantages of common GPS guidance system, a new kind of GPS guidance system has been developedThrough gathering and analyzing the dynamic transportation information, the new system can offer the smooth guidance route of short time, combining with electronic map and localization system, which can improve the vehicle movement quality and alleviate traffic jam to some extent
Journal Article•
TL;DR: The transport policy making up and execution has an important guiding effect for solving crowded urban traffic and improving city air conditions and doing the quantitative analysis for TECC effect can prove the transport policy is one of the critical aspects affecting T ECC.
Abstract: The transport policy making up and execution has an important guiding effect for solving crowded urban traffic and improving city air conditions Take Beijing drive limit policy as an example, calculating with the real data and doing the quantitative analysis for TECC effect can prove the transport policy is one of the critical aspects affecting TECC
Journal Article•
TL;DR: Based on the analysis of the indexes of trips, travel mode, travel time distribution and trip distance distribution with the survey data of Ningbo city and other cities, the rules, characteristics and causes of resident travel are summarized as mentioned in this paper.
Abstract: Based on the analysis of the indexes of trips, travel mode, travel time distribution and trip distance distribution with the survey data of Ningbo city and other cities, the rules, characteristics and causes of resident travel are summarized. The transport development policies are also suggested based on the resident travel characteristics such as trip generation increase, trip distance increase,longer travel time, higher partition of private travel, higher intra-zone traffic volumes, higher peakhour traffic volumes. The development policies are public transport development priority, jobs provided nearby, building BRT system and management of transportation demand, which have positive meaning on advancing the traffic development in Ningbo city.
Journal Article•
TL;DR: In this paper, the authors summarized the importance and complexity of bridge loading test and some important fields for future research are also proposed, which has pushing effect on the development and improvement of bridge load test.
Abstract: Bridge loading test is the most effective, direct and convincible method for evaluating bridge carrying capacity In allusion to the importance and complexity of bridge loading test, some key points are summarized and some important fields for future research are also proposed, which has pushing effect on the development and improvement of bridge loading test
Journal Article•
TL;DR: Accessing the vehicle speed range in freeway, the use of RFID technology can effectively reduce speeding violations and enhance traffic safety.
Abstract: RFID is non-contact automatic identification technology which could be applied to various industries extensively and widely. Accessing the vehicle speed range in freeway, we could use RFID technology to manage vehicles. Then we could determine whether the vehicles are overspeed. Therefore, the use of RFID technology can effectively reduce speeding violations and enhance traffic safety.
Journal Article•
TL;DR: In this paper, a new Danish design guide is based on mathematical model of pavement performance (MMOPP), considering various factors, its operation results can be quantified at a certain reliability level, reaching specific design level.
Abstract: A new Danish design guide is based on mathematical model of pavement performance (MMOPP) Considering various factors, its operation results can be quantified at a certain reliability level, reaching specific design level
Journal Article•
TL;DR: The research on technical guarantee system and organization measures of Carpool system has a certain of practical meaning to the implementation of carpool system of taxi.
Abstract: Many taxies often runs with none or fewer passengers for high price and other factors, occupying a lot of road resources and increasing the traffic congestion. The implementation of carpool system conduces to improving the frequency of taxi travel, which has great significance to protecting the income of taxi drivers and reducing the road congestion and energy sources consumption in transport system. The research on technical guarantee system and organization measures of carpool system has a certain of practical meaning to the implementation of carpool system of taxi.
Journal Article•
TL;DR: The basic analysis method of tyre burst is put forward based on traffic accident investigation, which can provide basis for traffic accident disposal, inspection and identification.
Abstract: Tyre burst is a common form in traffic accident. Exact analysis on the causes and types of tyre burst is the base of confirming the fact of accident accurately. By introducing the main patterns of tyre breakage, and analyzing the cause and mechanism of tyre burst, the basic analysis method of tyre burst is put forward based on traffic accident investigation, which can provide basis for traffic accident disposal, inspection and identification.
Journal Article•
TL;DR: In this article, the authors considered the complex factors impacting urban public transport operation quality as a big system, using interpretative structure model (ISM) of system engineering to analyze the direct and indirect connection of factors in the system, drawing a multistage hierarchical structure,describing the interrelation of the factors, and then finding out the ultimate factors affecting the operation quali-ty of urban public transit, the main reason which leads to the low share rate of public transport is deduced.
Abstract: By regarding the complex factors impacting urban public transport operation quality as a big system,using interpretative structure model (ISM) of system engineering to analyze the direct and indirect connection of factors in the system,drawing multistage hierarchical structure,describing the interrelation of the factors,and then finding out the ultimate factors affecting the operation quali-ty of urban public transport,the main reason which leads to the low share rate of public transport is deduced,meanwhile,the corresponding strategy and specific measures are put forward.
Journal Article•
TL;DR: Based on the characteristic of bus dispatching, the constraint conditions of fully loaded ratio, the maximal and the minimal departure interval are considered and the optimal model with the maximum profits of both corporation and passenger is established.
Abstract: Based on the characteristic of bus dispatching,the constraint conditions of fully loaded ratio,the maximal and the minimal departure interval are considered,the optimal model with the maximum profits of both corporation and passenger is established. And genetic algorithm is applied to solve the model. The practical application shows that the model with the algorithm could obtain the satisfactory solution of bus departure interval rapidly.