Tesis sobre el tema "Urban Traffic Simulator"
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Uh, Jason (Jason J. ). "Virtual urban traffic network simulator". Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66818.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (p. 41).
In this project, I designed and implemented a virtual urban traffic network simulator. The simulator serves as a testbed for human-subject experiments to determine driver behavior in road networks and also as a platform for testing route-planning algorithms. The simulator was implemented using the C4 game engine and OpenGL. The simulator is capable of producing both 3- and 2-dimensional visualizations of a traffic network. In this thesis, I describe the key components of the simulator, the necessary inputs, and the expected outputs. I verify operation of the simulator through observation of the actual system outputs.
by Jason Uh.
M.Eng.
Wright, Steven. "Supporting intelligent traffic in the Leeds driving simulator". Thesis, University of Leeds, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274218.
Texto completoLackey, Nathan. "Simulating Autonomous Vehicles in a Microscopic Traffic Simulator to Investigate the Effects of Autonomous Vehicles on Roadway Mobility". The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555072367385629.
Texto completoAronsson, Karin F. M. "Speed characteristics of urban streets based on driver behaviour studies and simulation". Doctoral thesis, Stockholm : Division of transport och logistics, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4259.
Texto completoDe, Nunzio Giovanni. "Traffic eco-management in urban traffic networks". Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT064/document.
Texto completoThe problem of energy-aware traffic management in urban environment is addressed. Such traffic management aims at reducing vehicle stops, accelerations, energy consumption, and ultimately congestion. The eco-management in urban traffic networks may be divided in two broad categories: vehicle-side control and infrastructure-side control. Both control domains can feature isolated or coordinated characteristics, depending on the type of information used in the optimization.The vehicle-side traffic management influences each single vehicle according to its own characteristics and position. Isolated vehicle control aims primarily at optimizing the powertrain and/or the driving profile of the vehicles, possibly using information about the road characteristics, but without communicating with the other agents of the traffic network. Coordinated vehicle control makes use of communication among vehicles and with the infrastructure in order to achieve larger benefits in terms of energy consumption and traffic fluidity.The infrastructure-side management, on the other hand, influences traffic lights and road side panels in order to improve the performance of the traffic as a whole. Isolated infrastructure control regulates essentially the traffic lights at a single signalized intersection, or the speed limits in a single stretch of road, without taking into account the interactions with the neighboring junctions and/or road sections. Coordinated infrastructure control overcomes this limitation by using information about traffic conditions in other road sections to alleviate congestion.The contributions of this work to the energy-aware traffic management may be summarized as follows.Firstly, a solution for the coordinated vehicle control has been proposed, in which communication with the infrastructure is exploited to reduce energy consumption. In particular, the traffic lights timings are assumed to be communicated to the vehicle and known, and the vehicle is suggested an optimal speed to drive through a sequence of signalized intersections without stopping, while following a minimum-energy trajectory. The proposed strategy, independently applied to each vehicle, has been tested in a microscopic traffic simulator in order to assess the impact on the traffic performance. The analysis has demonstrated that the energy consumption and the number of stops can be drastically reduced without affecting the travel time.Then, a solution for the isolated infrastructure control has been proposed. A macroscopic urban traffic model has been introduced, and the variable speed limits have been used as actuation to improve traffic performance. In particular, the analysis has been carried out at saturated traffic conditions, with given and fixed traffic lights scheduling. The optimization aims at reducing the energy consumption in trade-off with the average travel time of the vehicles in the considered road section. Experiments have demonstrated that there exists an optimal speed limit that improves traffic performance and reduces the length of the queue at the traffic light.Lastly, a solution for the coordinated infrastructure control has been proposed. Traffic lights coordination on arterials has been proved to be effective in terms of traffic delay reduction. Our analysis has demonstrated that an optimization problem can be cast to take into account also energetic aspects. Extensive experiments in a microscopic traffic simulator have showed that a correlation exists between traffic progression and traffic performance indexes, such as energy consumption, travel time, idling time, and number of stops. The proposed control strategy has showed that a significant reduction of energy consumption can be achieved, almost completely eliminating number of stops and idling time, without affecting the travel time
Soldado, Sérgio Torres. "FPGA urban traffic control simulation and evaluation platform". Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/2190.
Texto completoThe study and development towards Urban Traffic Management and Control (UTMC) Systems have not solely or recently gained extreme importance only due to obvious issues such as traffic safety improvement, traffic congestion control and avoidance but also due to other underlying factors such as urban transportation efficiency, urban traffic originated air pollution and future concepts as are autonomous vehicle systems, which are presently taking shape. Generally speaking urban traffic simulations occur in a software environment, which comes to hinder the progress taken towards the actual implementation of UTMC systems. The reason to why such happens is based on the fact that urban traffic controllers are usually implemented and executed on hardware platforms, therefore software based models don‟t support an actual implementation directly. In this study we explore a novel approach to urban traffic simulation, aimed to eliminate the timeframe and work-distance between the UTMC system‟s design and an eventual implementation, where a Field Programmable Gate Array (FPGA) is used to execute a simulation model of an urban traffic network. Since the resource to FPGAs implies a hardware based execution, the resulting implementation of each traffic management and control element can be considered not only as having a close matched behavior to a real world implementation but also as an actual prototype. From the simulation viewpoint the use of FPGA‟s holds the prospect of being able to hold execution speeds many times faster than software based simulations as FPGA designs are able to execute a large number of parallel processes. This study shows that an Urban Traffic Control Simulation and Test Platform is possible by implementing a relatively simple urban network model in a low end FPGA. This result implies that with further time and resource investments a rather complex system can be developed which can handle large scale and complex UTMC systems with the promise of shortening the work distance between the concept and a real world running implementation.
Chiu, Yi-chang. "Generalized real-time route guidance strategies in urban networks". Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2002. http://wwwlib.umi.com/cr/utexas/fullcit?p3077621.
Texto completoRichard, Julien. "Apport des SIG et de la réalité virtuelle à la modélisation et la simulation du trafic urbain". Thesis, Paris Est, 2018. http://www.theses.fr/2018PESC1058/document.
Texto completoMapping and spatial data visualization are increasingly used to communicate to a wide audience, while providing specific expertise. We want to illustrate the application of geographical information systems to 4D urban traffic simulation thanks to new technologies such as virtual reality headsets. Road flow can be described in equations by discrete simulation (car by car) and continuous simulation (as a fluid flow).Firstly, we study the cartography history, more particularly the city representation over time. Urban traffic management is a critical piece for urban planners. Its representation has changed both with precise tools uses, and with current issues. An increase in urbanization leads us to be more and more farsighted of urban flows. It's not only a road networks question. These urbanization problems impact other networks as sanitation which are undersized dealing with population and surfaces damp-proofing increases. It's the same problem with the water supply which has to be replaced to cover the population needs, and more generally with all underground networks. We also study in this part the road network model via graphs and hypergraphs to optimize the code. Indeed, the chosen model, developed by Mr. Bouillé, the HBDS representation, is close to the object oriented code writing and helps to well structure a network. Afterwards we describe the development criterion through the raw data choice and the computer languages. Raw data choice is important to get the most realist simulation. The fact to make simulation all over the world, and not only in France, is one of the aims of this work. That's why we do a data analysis to find the best data to supply simulations. Then we expose methods and achievements that we implement for this study. In this part, we present the code organization and the geomatic tools helping to the city traffic simulation. We build many algorithms before coding, to optimize the conception time and to strengthen the created model. Moreover we talk about the benefits of a decision support tool in this context via the implementation tools :- Computer simulation,- Expert System with Artificial Intelligence creation. At least, visual results and perspectives are discussed. We describe the graphical user interface which had to be user-friendly. Indeed, owner user interfaces are often complicated. It has to be approachable to offer wide tools depending on users fields. As part of our thematic, we can limit interactions with the user and focus on targeted uses on simulation. We can also see the immersion view uses as the stereoscopy, technique underused in actual GIS
Kecir, Abd-El-Karim. "Performance evaluation of urban rail traffic management techniques". Thesis, Rennes 1, 2019. http://www.theses.fr/2019REN1S026/document.
Texto completoUrban rail traffic is subject to numerous disrupting events that drift it from its nominal behavior. In order to minimize the impact of these disturbances, rail operators rely on a set of techniques. Despite their efficiency, performances of theses techniques are rarely well studied, nor are they of proven optimality; a direct consequence of them being empirically built. It is in this particular context that comes our work to provide solutions that allow for the evaluation of such techniques and for the comparison of their relative performances in various scenarios. The proposed approach is based on variants of Petri nets as models, and on the Monte-Carlo method for the simulation of their execution. This combination has led to the development of SIMSTORS, a tool for the simulation of urban rail systems, and more generally, stochastic systems under dynamic rescheduling. Additionally, this thesis addresses the question of timetable realizability; that is whether or not a given timetable is indeed realizable by a system for which it was built. Indeed, a timetable is meant to drive the behavior of a system but there is no guarantee as to its realizability. We therefore propose a method for the verification of the realizability of timetables with a strictly positive probability
Zhou, Yi. "The macroscopic fundamental diagram in urban network: analytical theory and simulation". Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49111.
Texto completoAquino, Eduardo AraÃjo de. "ValidaÃÃo do modelo mesoscÃpico de trÃfego do scoot para o desenvolvimento de redes viÃrias urbanas microssimuladas". Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11054.
Texto completoUm das maiores dificuldades na construÃÃo de redes viÃrias urbanas microssimuladas reside na coleta dos dados de trÃfego para as fases de calibraÃÃo e validaÃÃo. PorÃm, a cidade de Fortaleza dispÃe de uma importante ferramenta de mesossimulaÃÃo que, alÃm de controlar o trÃfego urbano em tempo real, estima indicadores de trÃfego: sistema SCOOT â Split Cycle Offset Optmisation Technique. Este sistema, implantado em vÃrias cidades do mundo, controla e modela o trÃfego na regiÃo mais adensada da Ãrea urbana de Fortaleza, baseando-se na coleta contÃnua de ocupaÃÃo veicular sobre os seus mais de 900 laÃos detectores espalhados pela cidade. No entanto, por se tratar de valores simulados, carecem de verificaÃÃo antes de serem utilizados. O objetivo geral deste trabalho à desenvolver e implementar uma metodologia para validaÃÃo do modelo de simulaÃÃo mesoscÃpica do SCOOT, tendo em vista o uso de seus dados no desenvolvimento de modelos de microssimulaÃÃo do trÃfego, tendo como estudo de caso o sistema em operaÃÃo em Fortaleza. Por meio de experimentos, foram investigados os efeitos de dois fatores no erro de estimaÃÃo: a calibraÃÃo do parÃmetro SATO e o tempo de percurso mÃdio entre o laÃo detector e a faixa de retenÃÃo. Os resultados mostram que estes dois fatores afetam a qualidade da modelagem das variÃveis volume, atraso veicular e nÃmero de paradas. Os resultados desta pesquisa contribuem no sentido de oferecer uma metodologia de validaÃÃo que permita um melhor uso dos dados fornecidos pelo SCOOT.
Wang, Carter (Carter Robert Ren-Deh). "Urban transportation networks : analytical modeling of spatial dependencies and calibration techniques for stochastic traffic simulators". Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82859.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 79-82).
Exact numerical evaluation of the stationary joint queue-length distribution of a Markovian finite capacity network with arbitrary size and topology can be obtained numerically. Nonetheless, the main challenge to such an approach remains the dimensionality of the joint distribution, which is exponential in the number of queues. This thesis proposes an analytical approximation of the joint distribution with a dimension that is linear in the number of queues. The method decomposes the network into overlapping subnetworks. The state of each subnetwork is described aggregately, i.e. in terms of a reduced state space, while ensuring consistency with the disaggregate, i.e., full state space, distribution. This aggregation-disaggregation technique is proposed for the analysis of Markovian tandem finite capacity queueing networks. The model is validated. We present its use to address an urban traffic control problem, and show the added value of accounting for higher-order spatial between-queue dependency information in the control of congested networks. A second, distinct goal of this thesis is to examine the calibration of route choice parameters in microscopic traffic simulators. Automatically calibrating simulators using traffic counts requires describing the relationship between route choice and traffic flows. This thesis proposes an analytical finite capacity queueing model that accounts for the relationship between route choice and traffic flows. The method is embedded in a simulation-based optimization framework and applied to a calibration problem.
by Carter Wang.
S.M.in Transportation
Qian, Gongbin. "Effectiveness of eco-driving during queue discharge at urban signalised intersections". Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/65352/1/Gongbin_Qian_Thesis.pdf.
Texto completoLiu, Bernice. "EVALUATING URBAN DOWNTOWN ONE-WAY TO TWO-WAY STREET CONVERSION USING MICROSCOPIC TRAFFIC SIMULATION". DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2113.
Texto completoHyink, Jeffrey F. "Mobile sensor networks a discrete event simulation of WMD threat detection in urban traffic schemes". Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion.exe/07Mar%5FHyink.pdf.
Texto completoZernis, Rudolfs. "Modelling urban traffic congestion due to construction transports - The Case of Norrköping". Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-177545.
Texto completoExamensarbetet är utfört vid Institutionen för teknik och naturvetenskap (ITN) vid Tekniska fakulteten, Linköpings universitet
Magne, Laurent. "Commande optimale décentralisée du trafic urbain". Toulouse, ENSAE, 2001. http://www.theses.fr/2001ESAE0001.
Texto completoChevrolet, Dominique. "Deux études de transport urbain : ordonnancement des phases d'un carrefour, modèles désagrégés de déplacements dans l'agglomération grenobloise". Phd thesis, Grenoble 1, 1986. http://tel.archives-ouvertes.fr/tel-00321160.
Texto completoAl-Anazi, F. K. "Vehicle journey time and delay on major urban highways : Vehicle movement on urban highways is examined by means of a computer simulation model, the effects of signal timing and pedestrian crossings are considered". Thesis, University of Bradford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234736.
Texto completoBailey, Nathaniel Karl. "Simulation and queueing network model formulation of mixed automated and non-automated traffic in urban settings". Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107069.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 41-43).
Automated driving is an emerging technology in the automotive industry which will likely lead to significant changes in transportation systems. As automated driving technology is still in early stages of implementation in vehicles, it is important yet difficult to understand the nature of these changes. Previous research indicates that autonomous vehicles offer numerous benefits to highway traffic, but their impact on traffic in urban scenarios with mixed autonomous and non-autonomous traffic is less understood. This research addresses this issue by using microscopic traffic simulation to develop understanding of how traffic dynamics change as autonomous vehicle penetration rate varies. Manually driven and autonomous vehicles are modeled in a simulation environment with different behavioral models obtained from the literature. Mixed traffic is simulated in a simple network featuring traffic flowing through an isolated signalized intersection. The green phase length, autonomous vehicle penetration rate, and demand rate are varied. We observe an increase in network capacity and a decrease in average delay as autonomous vehicle penetration rate is increased. Using the results of the simulation experiments, an existing analytical network queueing model is formulated to model mixed autonomous and non-autonomous urban traffic. Results from the analytical model are compared to those from simulation in the small network and the Lausanne city network, and they are found to be consistent.
by Nathaniel Karl Bailey.
S.M. in Transportation
Mahbub, S. M. Parvez Bin. "Impact of urban traffic and climate change on water quality from road runoff". Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/47139/1/Parvez_Mahbub_Thesis.pdf.
Texto completoRamadhan, Rawan. "Comparison of Single Point Urban Interchange and Diverging Diamond Interchange Through Simulation". University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1557316913678785.
Texto completoBuisson, Jocelyn. "Un modèle d'environnement pour la simulation multi-agents des déplacements en milieu urbain". Thesis, Belfort-Montbéliard, 2014. http://www.theses.fr/2014BELF0252/document.
Texto completoSimulation constitutes a major approach for the conception, development, analysis and evolution of urban systems. This thesis focusses on the modeling and simulation of movements (pedestrian, vehicle, cycle) within urban environments. The industrial context associated with this thesis requires to consider the movements of each entity in a three dimensional universe. In this thesis, we propose to address the scientific and technological challenges by using autonomous entities, called agents, to model the individuals. In agent-based simulation three elements must be defined: the agent behaviors, their interactions with other agents, and with the environment. The environment models the structure of the world and its endogenous dynamics. Unfortunately, it is still difficult to find an environment model that answers all the different scientific and technological problems addressed in this thesis. Consequently, an environment model named HEterogenous Dual Graph Environment (or HEDGE) is proposed. The HEDGE model is based on a decomposition of the environment using zones that are linked with navigation and perception links. This graph structure is at the center of our model. It is designed to “naturally” model the environment, and it allows an efficient simulation of the system composed of the environment and the agents. The environment’s missions and dynamic processes are modeled using mechanisms, which are inspired by the laws of Physics. The actions provided by the agents and the endogenous dynamics algorithms correspond to physical forces to apply to objects in the world. A model of conflict detection and resolution between those forces is used to ensure the coherence of the environment model state. In the last part of this thesis, the HEDGE model is used in the context of two urban planning projects in the city of Belfort, and its metropolitan area. The product of this model’s application is used in the context of technical studies (preliminary studies, pre-project), communication (consultation and public debates) and promotion (exposition, valorization) in the form of interactive 3D software
Tong, C. O. (Chung On) 1945. "A schedule-based transit network model". Monash University, Dept. of Civil Engineering, 1986. http://arrow.monash.edu.au/hdl/1959.1/7935.
Texto completoEmery, Justin. "La ville sous électrodes : de la mesure à l'évaluation de la pollution atmosphérique automobile. : vers une simulation multi-agents du trafic routier en milieu urbain". Thesis, Dijon, 2016. http://www.theses.fr/2016DIJOL018/document.
Texto completoBased on surveys, traffic is constructed from assumptions about the relationship between origins and destinations. In order to rebuild a road traffic wich would be closer to observation and on a wider set of road sections, it appears interesting to use counting data from urban sensors : this is our starting point of view. The insertion of these in-situ dataset in the road traffic measurement provides the opportunity to experience the potential of sensors to estimate Traffic Air Pollution (TAP) levels at the intraurban scale. However, this requires to change the nature of these estimation, here through the construction of a model of multi-agents simulation, in order to extract more information on the road traffic. More generally, this work can be seen as a a knowledge building approach on TAP emisssions which is discussed throughout this work. The implementation of the SCAUP (multi-agent simulation from Urban sensors for traffic air pollution) approach was developped in three stages: 1. Focusing on the quantification of road traffic devices through urban sensors; 2. Proposing a modeling approach for road traffic data simulation ; 3. Using as a reference the national framework used by AASQA to calculate RTA emissions. All is integrated within a technical matrix that forms the spine of the manuscript through three interrelated systems: quantification, modeling and evaluation. This work is part of an experimental approach dedicated to the calculation of TAP emissions based on traffic simulations. Sponsored by the ATMOSF’AIR BOURGOGNE local AASQA, this work could also be used in an operational mode for these organizations in charge of the air quality monitoring. At a time when the big data enters into new questions about the ability of researchers to extract knowledge, we propose a geographical approach that enables to replace the data in the center of an original road traffic simulation approach (data- driven)
Klein, Achim. "Annoyance indicators for various urban road vehicle pass-by noises and urban road traffic noise combined with tramway noise". Thesis, Vaulx-en-Velin, Ecole nationale des travaux publics, 2015. http://www.theses.fr/2015ENTP0002/document.
Texto completoNoise pollution is a major concern for residents of urban areas. To date, the European directive 2002/49/CE requires member states to represent community noise through noise maps. These are produced using the Lden (day-evening-night level) index which is also employed for dose-effect relationships in noise annoyance prediction. However, for the assessment of noise annoyance in urban areas, its relevance is often questioned. Numerous studies have shown that noise annoyance due to community noise is not solely based on the sound pressure level and other acoustical signal characteristics such as temporal and spectral features influence noise annoyance ratings. This thesis aims to improve the assessment of noise annoyance due to various road vehicle noises in cities. It is based on experiments carried out in laboratory conditions and comprises two main parts. The first addresses the enhancement of the physical and perceptual characterization of annoyance due to various urban road vehicle pass-by noises, such as buses, poweredtwo- wheelers, heavy vehicles and light vehicles. A specific focus is put on the characterization of annoyance due to powered-two-wheelers which are among the most annoying road vehicles and studied little in the existing literature. An indicator accounting for annoyance-relevant auditory attributes of urban road vehicle pass-by noises is determined: it comprises loudness, a spectral index and two modulation indices proposed in this work. In urban agglomerations, people are often exposed to road traffic in presence of a variety of other environmental noise sources. The focal point of the second part is on the prediction of total annoyance due to urban road traffic noise combined with tramway noise. In the aim of adequately characterizing total annoyance, first the perceptual phenomena involved in annoyance due to the combination of the sources are studied. Furthermore, the analysis allows for the testing of the proposed noise annoyance indicator for the characterization of urban road traffic noise. To characterize annoyance due to tramway noise, an indicator determined in a recent study is employed. Based on these indicators and the findings regarding perceptual phenomena, models for the prediction of total annoyance due to combined urban road traffic and tramway noise are proposed
Norhidayah, Binti Abdull. "Model Simulation and Health Risk Assessment on Traffic-Induced Air Pollution in Urban Environments:A Case Study of Kyoto City, Japan". Doctoral thesis, Kyoto University, 2020. http://hdl.handle.net/2433/259034.
Texto completo0048
新制・課程博士
博士(工学)
甲第22766号
工博第4765号
新制||工||1745(附属図書館)
京都大学大学院工学研究科都市環境工学専攻
(主査)教授 米田 稔, 教授 高野 裕久, 准教授 藤森 真一郎
学位規則第4条第1項該当
Doctor of Philosophy (Engineering)
Kyoto University
DFAM
Mariotte, Guilhem. "Dynamic Modeling of Large-Scale Urban Transportation Systems". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSET010/document.
Texto completoCongestion in urban areas has become a major issue in terms of economic, social or environmental impact. For short or mid term, using dynamic road traffic simulation can help analyzing and providing guidelines to optimization policies of existing infrastructures. Today, because of the complexity of transport systems, classical modeling tools are limited to small geographical areas (of a district size). Computational time, together with simulation calibration, are notably very constraining at large scales. However, a new generation of models designed for metropolitan areas has arisen over the past decades. These models are based on a phenomenological relationship between travel production and the number of vehicles in a given spatial area of a road network, known as the Macroscopic Fundamental Diagram (MFD). This relationship, supported by empirical evidences from several cities around the world, has allowed the study of different traffic control schemes at a whole city scale, but was rarely used for traffic state forecasting. The aim of this PhD is to propose an efficient modeling tool, based upon the concept of MFD, to simulate and analyze traffic states in large metropolitan areas. The theoretical framework of this tool must be consistent and applicable for traffic state forecasting, development of new control policies, traffic emission estimation, etc. There are two major contributions in this PhD. The first one is analyzing the mathematical and physical properties of existing models, and formalizing the dynamics of several trip lengths inside the same urban zone. In particular, this formalization distinguishes between internal trips and trips crossing the zone. Flow merging and diverging issues are also addressed when congestion propagates from one zone to another. The second contribution is proposing a new trip-based model based on individual traveled distance. This approach allows to treat users independently (previously represented with continuous flows), and thus to define their characteristics more precisely to couple their trips with assignment models on different paths. Finally, examples of application from various collaborations are given in the last part of this thesis. It includes a simulation study of the Grand Lyon urban area (France), as well as new modules to simulate search-for-parking or perimeter control. This PhD is part of a European ERC project entitled MAGnUM: Multiscale and Multimodal Traffic Modeling Approach for Sustainable Management of Urban Mobility
Pozzetti, Paulo Henrique. "Analise de simulação de cruzamento semaforizado". [s.n.], 2002. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257949.
Texto completoDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil
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Resumo: Da concorrência entre os elementos participantes do sistema de circulação surgem os conflitos, que em seus maiores graus de severidade se transformam em acidentes de trânsito. Estes acidentes devem ser analisados sobre diversos pontos de vista para que sua compreensão possa ajudar em medidas corretivas. Este trabalho visa identificar a influência de painéis dinâmicos de propaganda no tempo de percepção e reação do motorista, na visualização do conjunto semafórico, em cruzamentos com altos Índices de acidentes na cidade de São Paulo, através de simulação animada em 2D em ambiente computacional. Através dos dados sobre acidentes, foi selecionado na cidade de São Paulo, o cruzamento da Av. Rebouças com a Av. Brigadeiro Faria Lima para a simulação, definindo um modelo genérico envolvendo: distância de frenagem e distância percorrida durante os tempos de percepção. Para o teste de hipóteses variadas analisou-se a interferência dos parâmetros velocidade, tempo de percepção e campo de visão do grupo focal. O modelo foi elaborado através dos registros fotográficos do local, sendo gerados 36 filmes. Cada filme representava uma combinação diferente das variáveis. Os filmes foram apresentados para grupos de usuários para a identificação da cor do semáforo: o primeiro na Faculdade de Engenharia Civil da UNICAMP e o segundo na CET - Companhia de Engenharia de Tráfego - SP, totalizando 180 participantes. identificação da cor do semáforo: o primeiro na Faculdade de Engenharia Civil da UNICAMP e o segundo na CET - Companhia de Engenharia de Tráfego - SP, totalizando 180 participantes. Ao se analisar os dados obtidos nota-se que as variáveis com maior significância estatística, na visualização do grupo focal, para o modelo desenvolvido, foram as variáveis velocidade, tempo de percepção e a presença do painel. Surpreendentemente a presença do painel atrás do grupo focal contribui para uma correta identificação do semáforo. Observou-se que para velocidades maiores o nível de indefinição na identificação do semáforo é maior. A adoção de tempos de percepção e reação maiores que dois segundos são recomendáveis. Para o modelo desenvolvido não foram relevantes a familiaridade com o local e o ambiente em que os testes foram aplicados. Percebe-se que uma simulação animada em 2D montada em programa para ambientes de navegação para WWW pode incrementar a análise de segurança viária
Abstract: Conflicts emerge from the competition between elements participating in the circulation system, when these achieve severe degree traffic accidents occur. These accidents should be analyzed trom various points view so that its comprehension may indicate corrective measures. This work aims to identify the influence of dynamic publicity panels in the perception-reaction time of drivers in the visualization of light signals of intersections with high accidents rates in the city of São Paulo using an animated 2D simulation in a computer environment. The intersection of Rebouças Avenue and Brigadeiro Faria Lima Avenue was selected as the study site in the simulation. A generic model was defined using the breaking and traversed distance during perception time. The interference of the variables speed, perception time and environment behind the light signal was analyzed in the model. The animation was developed using photographs of the site generating 36 different films. Each film represented a different combination of variables. The films were presented to groups of users for their identification of the color of the light signal: the first group at the Faculdade de Engenharia Civil at UNICAMP and the second group at the Compania de Engenharia de Tráfego (CET) at SP, summing up to 180 participants. Data analyses pointed out that the variables with greatest statistical significance in the focal group for the developed model were speed, perception time and presence of the panel. Surprising1y, the presence of the panel behind the focal group contributes for the correct perception of the light signal. It was also observed that in higher velocities the indefinition in identification of the light signal is greater. There for, it is recommended the use of perception-reaction time higher then 2 seconds. In the developed model the variables familiarity with the site and group of users were not relevant. It can be conc1uded that the 2D animated simulation in computer environment increments the ana1ysis of traffic safety
Mestrado
Transportes
Mestre em Engenharia Civil
Archer, Jeffery. "Indicators for traffic safety assessment and prediction and their application in micro-simulation modelling : a study of urban and suburban intersections". Doctoral thesis, KTH, Trafik och Logistik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143.
Texto completoQC 20100830
Archer, Jeffrey. "Indicators for traffic safety assessment and prediction and their application in micro-simulation modelling : a study of urban and suburban intersections /". Stockholm, Sweden : Royal Institute of Technology, 2005.
Buscar texto completoTouhbi, Saâd. "Élaboration d’un modèle multi-agents pour la génération synthétique de trafic : application à la mobilité urbaine de la ville de Marrakech". Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS326.
Texto completoTraffic generation is an important process in traffic simulation. It defines a series of vehicle arrival at a road. This series is proven to be random since 1930. However, its distribution explains at a level the behavior of the motorists. The goal of this thesis is to establish a traffic generation toolbox to produce a series of vehicle arrival characterized by their entry point, their type, arrival time and their initial speed. A first step was to establish an analysis protocol for the time headway (TH) of the arriving vehicles consisting of four steps : (i) data processing and calculating TH, (ii) sampling of data according to different levels of traffic, (iii) model choice and estimation, (iv) and the comparison of the estimated models and the empirical data. The application of the latter on four roads with three lanes interrupted by a signalized intersection showed that : The Pareto IV model is not rejected for all levels of traffic in these roads, the Exponential model is proven to be inadequate for all levels of traffic, the Log-Normal and Pearson III are best suited for intermediate to high levels of traffic. These results helped in testing the traffic generation toolbox proving that it generates coherent level of traffic compared to the desired configuration. The latter was integrated in the simulation MarrakAir that estimated the level of pollution based on traffic. This was done to eliminate the necessity to have punctual data from sensors about vehicle arrivals
Baradel, Bernard. "Un outil d'aide à la régulation du trafic sur réseau autoroutier maillé périurbain". Lyon, INSA, 1994. http://www.theses.fr/1994ISAL0113.
Texto completoOn peri-urban motorway network congestion problems are growing due to lack of capacities and incidents. People in charge of traffic control are concerned with system which can avoid or limit congestion and help to control such difficult situations. A methodology is described on LYON and PARIS networks in order to build traffic control systems. The software part of a system is an aid to decision tool to develop strategies using information and guidance messages on Variable Message Signs. This system, called OPERA makes use of a traffic flow simulation model for networks and a knowledge-based system which proposes VMS controls linked with detailed explanations. A mock-up has been designed and tested using real data on the northeast Paris regional motorway network on the Scottish network. Results are presented and discussed which indicate a 5% reduction in the travel tir for all journeys using the OPERA system
Sousa, Janailson Queiroz. "Modelagem microscÃpica aplicada na avaliaÃÃo do desempenho da seguranÃa viÃria em interseÃÃes urbanas". Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9059.
Texto completoA modelagem microscÃpica do fluxo de veÃculos na infraestrutura viÃria urbana tem se constituÃdo uma potencial ferramenta para a anÃlise do desempenho da seguranÃa viÃria (DSV) frente aos tradicionais mÃtodos de anÃlise com base nos estudos observacionais. Para consolidar essa abordagem existem desafios prÃticos e metodolÃgicos que foram tratados como objetivos nesta pesquisa, dentre os quais se destacam: (i) a identificaÃÃo de indicadores proxy eficientes para as anÃlises de seguranÃa nesse ambiente; (ii) a anÃlise dos algoritmos de microssimulaÃÃo quanto a sua eficÃcia de representaÃÃo dos processos de conduÃÃo no meio urbano, (iii) a definiÃÃo de um procedimento sistemÃtico de estimaÃÃo do DSV com o uso de microssimuladores de trÃfego e (iv) a validaÃÃo dos indicadores sintÃticos usados para medir o DSV. Diante deste contexto, esta pesquisa tem como objetivo geral apresentar uma contribuiÃÃo metodolÃgica para a utilizaÃÃo da microssimulaÃÃo de trÃfego nas anÃlises do DSV no processo de planejamento tÃtico operacional dos sistemas de transporte com foco nas interseÃÃes urbanas. O procedimento metodolÃgico proposto considerou a realizaÃÃo de cinco etapas: 1) seleÃÃo e caracterizaÃÃo do local de estudo, 2) codificaÃÃo do local no microssimulador, 3) planejamento da simulaÃÃo, 4) calibraÃÃo e validaÃÃo do modelo e 5) estimaÃÃo dos indicadores. A aplicaÃÃo do procedimento considerou trÃs interseÃÃes semaforizadas da cidade de Fortaleza, utilizando a plataforma de microssimulaÃÃo de trÃfego VISSIM. Os resultados alcanÃados indicaram que foi possÃvel estimar o DSV com relativo nÃvel de confianÃa e um procedimento complementar de validaÃÃo dos indicadores revelou um nÃvel de consistÃncia entre o nÃmero estimado de conflitos de interaÃÃes longitudinais e o nÃmero observado de colisÃes traseiras observadas em campo.
The microscopic modeling of traffic flow in urban road infrastructure has proven to be a potential tool for analyzing the performance of road safety (DSV) compared to traditional methods of analysis based on observational studies. To consolidate this approach there are practical and methodological challenges that have been treated as objectives in this research, among which are: (i) the identification of efficient synthetic indicators for the analysis of safety in this environment, (ii) the analysis of the microscopic algorithms and their effectiveness in the representation of the driving processes in urban areas, (iii) the definition of a systematic procedure for estimating the DSV using a microscopic platform and (iv) concerning the validation of synthetic indicators used to measure the DSV. Given this context, this research intended to provide a general methodological contribution to the use of microscopic traffic simulators for the analysis of the DSV in tactical and operational transportation systems planning process with focus on urban intersections. The proposed methodological procedure considered the completion of five steps: 1) selection and site characterization study, 2) coding the site in microsimulator 3) planning of the simulation, 4) calibration and validation of the model and 5) estimation of the indicators. The procedure considered three signalized intersections in the city of Fortaleza, using VISSIM Â as simulation platform. The results indicated that it was possible to estimate the DSV with relative confidence level and a complementary procedure for validation of the indicators showed a consistent level of consistency between the estimated number of conflicts of longitudinal interactions and observed number of rear end collisions observed in the field.
Terra, Ulisses Demarchi Silva. "Arquitetura em espaços de fluxo: modelagem e simulação em estações metroferroviárias e espaços de multidão". Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/16/16132/tde-07072014-133708/.
Texto completoThis essay aims at investigating how the pedestrian flow interferes the architectural design of the places full of people. Regarding the subway and rail stations as the initial objective, it was made a comprehensive bibliographic survey about this subject in order to speaking about the human behavior engineering, architecture and construction complexity. It is presented the modeling and simulation concepts of pedestrian flows which function as the basis for the development of a case study of different architectural spaces design: the Arena das Dunas Stadium in Natal, the Mineirão Stadium in Belo Horizonte, the Olympics Park in Rio de Janeiro and the subway stations interconnection Consolação-Paulista in São Paulo. This essay does not intend to present solutions or design guide lines for places full of people, but investigate how the design of these places can be changed from an approach that is considering the pedestrians as a determinant element of the architecture.
Longo, Riccardo. "Advanced turbulence models for the simulation of air pollutants dispersion in urban area". Doctoral thesis, Universite Libre de Bruxelles, 2020. https://dipot.ulb.ac.be/dspace/bitstream/2013/312254/3/thesis.pdf.
Texto completoDoctorat en Sciences de l'ingénieur et technologie
info:eu-repo/semantics/nonPublished
Awasthi, Anjali. "Développement d'un système de routage hiérarchique pour les réseaux urbains". Phd thesis, Université de Metz, 2004. http://tel.archives-ouvertes.fr/tel-00007751.
Texto completoLa deuxième partie de la thèse est consacrée au problème de décomposition d'un réseau urbain en sous réseaux de taille raisonnable et aussi indépendants les uns des autres que possible, c'est-à-dire ayant un nombre de connexions
aussi faible que possible.
Dans la troisième partie de la thèse nous présentons un programme de simulation pour générer les données qui, à leur tour, vont servir à constituer une mémoire. Cette mémoire a pour objectif de proposer le chemin le plus rapide à l'intérieur d'un sous-réseau dès que l'on connaît l'état du sous-réseau ainsi que l'origine et la destination du véhicule.
Enfin, la dernière partie de la thèse est la plus novatrice. Elle fait intervenir les techniques de l'analyse des données pour constituer la mémoire et permettre ainsi de choisir le chemin le plus rapide en temps réel.
Boussier, Jean-Marie. "Modélisation de comportements dans les systèmes dynamiques : Application à l'organisation et à la régulation de stationnement et de déplacement dans les Systèmes de Trafic Urbain". Phd thesis, Université de La Rochelle, 2007. http://tel.archives-ouvertes.fr/tel-00411272.
Texto completoGalván, William Felix Angeles. "Estudo do impacto dos modelos de propagação no desempenho de protocolos ad hoc em um ambiente VANET urbano". Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/1824.
Texto completoDiferentes estudos avaliaram o desempenho de protocolos de roteamento Ad hoc para redes veiculares. No entanto, a maioria deles não são realistas pois utilizam modelos de propagação simples para redes veiculares sobre ambiente urbano, o que limita a precisão dos resultados. O objetivo deste trabalho é comparar o impacto no desempenho dos protocolos de roteamento Ad hoc (entre eles AODV, DSR, DYMO e OLSR) em diferentes modelos de propagação (entre eles Espaço Livre, Dois Raios, Nakagami e Sombreamento Log Normal) com valores de parâmetros reais em um mapa urbano real. Os cenários e parâmetros das simulações foram desenvolvidos nos simuladores Omnet++ e SUMO. As métricas avaliadas foram atraso médio fim-a-fim e a taxa de entrega de pacotes. Os resultados mostraram que o comportamento dos protocolos varia bastante conforme o modelo utilizado (modelos simples ou complexos). A contribuição deste trabalho diz respeito à configuração e avaliação de um cenário veicular real em um ambiente urbano, para ser base de estudos futuros e permitir que eles conheçam a resposta desses protocolos de roteamento em diferentes modelos de propagação.
Different studies evaluated the performance of Ad hoc routing protocols for vehicular networks. However, most of them are not realistic because on propagation models are used simple propagation models for vehicular networks on urban environment, which limits the accuracy of the results. The objective of this study is to compare the performance impact of Ad hoc routing protocols (including AODV, DSR, DYMO and OLSR) under different propagation models (including Free Space, Two Ray Ground, Nakagami and Log Normal Shadowing) with real parameters values in an existing urban map. The scenarios and parameters of the simulations were developed in Omnet++ and SUMO simulators. The evaluation metrics were the average end-to-end delay and the package delivery rate. The results showed that the behavior of protocols varies widely depending on the model used (complex or simple model). The contribution of this work concerns the configuration and evaluation of a real vehicular scenario in an urban environment, to be the basis of future studies to allow them know the response of these routing protocols in different propagation models.
Gille, Laure-Anne. "Caractérisation physique et perceptive de différentes compositions de trafic routier urbain pour la détermination d'indicateurs de gêne en situation de mono-exposition et de multi-exposition". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSET005/document.
Texto completoRoad traffic noise, and in particular powered two-wheeler noise, constitute an important source of noise annoyance. In order to estimate the noise exposure in cities of more than 100 000 inhabitants, the European directive 2002/49/EC requires the elaboration of strategic noise maps, based on the Lden index. This index is also used in exposureresponse relationships, to predict the percentages of annoyed people, by road traffic noise for example. By coupling strategic noise maps and these exposure-response relationships, noise annoyance maps could be established. The relevance of this index to predict noise annoyance in cities is however often questioned, since many influential acoustical factors (e.g. spectral and temporal features) are not considered by this index. The aim of this thesis is to enhance the characterization of noise annoyance due to different compositions of urban road traffic including powered two-wheelers. To achieve this goal, experiments were carried out under controlled conditions. A first study concerned the influence of several acoustical features related to quiet periods and vehicle pass-by noises on the annoyance due to urban road traffic noise. This study demonstrated the influence of the presence of quiet periods and of the number of vehicles within the urban road traffic and to the absence of the influence of the order of the vehicle pass-by noises, the position and duration of quiet periods. These results were used to carry out the physical and perceptual characterization of different compositions of urban road traffic noise. Multilevel regression was used to calculate noise annoyance, by coupling combinations of indices relating to influential acoustical features and an individual factor: noise sensitivity. In cities, road traffic noise is often combined with other noises. In the framework of this thesis, noise exposure to road traffic noise combined with aircraft noise was studied. Therefore, the same work as the one performed for urban road traffic noise was carried out for aircraft noise, leading also to relevant combinations of noise indices. In order to characterize annoyances due to road traffic noise and to aircraft noise in a combined exposure situation, data from the previous experiments and from an experiment dealing with these combined noises were used through an appropriate multilevel regression, as done in literature. The regression allows annoyance models for each noise source to be proposed. Then, total annoyance due to combined noises was studied, in order to highlight the perceptual phenomena related to the combined exposure. Total noise annoyance models were proposed, using proposed annoyance model of each noise source. Finally, these single source annoyance models and total annoyance models were tested using data of a socio-acoustic survey. To do this, a methodology has been proposed to estimate the different indices involved in the annoyance models, from the Lden values obtained from the strategic noise maps and used to define the noise exposure of the respondents. This confrontation showed that the models proposed on the basis of experiments carried out under laboratory conditions and coupled with a methodology of estimation of the noise indices from Lden values, enabled a good prediction of in situ annoyance
Kerbouai, Hamza. "Modélisation, dimensionnement et optimisation d'un capteur hybride pour la détection des deux roues motorisées dans le trafic routier". Thesis, Belfort-Montbéliard, 2015. http://www.theses.fr/2015BELF0260/document.
Texto completoFor several years the road safety numbers show the need to develop a technological tool that aims to know thepowered two wheelers vehicles behavior (2PW) to improve their security. From this problematic arise our researchworks that come under the project METRAMOTO (Powered two wheelers traffic measurement for road safety andrisks assessment). The main objective is modeling, sizing and optimization of an hybrid sensor consisted ofelectromagnetic loops and piezoelectric shock sensors. The idea is to use electromagnetic loops to discriminate the2PW presence from the other vehicles, combined with piezoelectric segments to detect the shocks produced by thevehicles wheels passage, all associated with a management algorithm and data processing. Today the sizing of thedetection systems based on electromagnetic loops or piezoelectric cables is done experimentally on controlled sitesusing several vehicles types. This technique requires significant test series which are costly and dangerous. Thisstudy aims to modeling the different interactions between the studied sensor and vehicles in order to its sizing.Electromagnetic and electromechanical models are developed to describe the different interactions that take placebetween electromagnetic loops on the one hand, between electromagnetic loops and vehicles on the other handand those between vehicle wheels and piezoelectric cable. On the basis of established models, a general approachis elaborated driving to sizing the hybrid sensor for any given road. We are also interested to the data processingcoming from the hybrid sensor for which we propose an approach to identifying the different vehicle categoriesincluding the 2PW. Two sensor configurations for two different roads are then proposed. They are associated atdata processing algorithms allowing the acquisition of loops and cables signals, the distinction between the differentvehicles classes, the estimation of the vehicles positions on the road and the measuring of their speed
Diniz, Junior Paulo Carvalho. "Serviços telemáticos em uma rede de transporte público baseados em veículos conectados e dados abertos". Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2691.
Texto completoUm conceito bastante em voga atualmente e o de cidades inteligentes. Ele define um tipo de desenvolvimento urbano capaz de reduzir os impactos ambientais, melhorando os modelos atuais de acesso a recursos naturais, transportes, gestão do lixo, climatização residencial e sobretudo a gestão da energia (produção e distribuição). O massivo volume de dados produzidos por cidades inteligentes oferece uma grande oportunidade para analisar, compreender e melhorar o modo como elas funcionam e se desenvolvem. Esta explosão na quantidade de informações tem elevado a importância do aprendizado a partir de dados a um patamar extremamente elevado. Esta dissertação tem por objetivo descrever uma metodologia para aquisição e exploração de dados de um dos mais importantes pilares de cidades inteligentes: o sistema de transporte público. Como obter, armazenar e utilizar tais dados a fim de prover a todos os envolvidos, serviços telemáticos de alto valor agregado e o problema que se busca resolver neste trabalho. Cinco serviços telemáticos são propostos sob forma de prova de conceito: avaliação da cobertura da rede de transporte atual, seguida de uma proposta de novas linhas de ônibus; avaliação indireta da ocupação diária dos ônibus da cidade; cerca-eletrônica com os limites geográficos definidos pelos itinerários das linhas; serviços de alerta de velocidade e de manutenção. Os resultados são bastante coerentes e promissores, abrindo um grande leque de possíveis trabalhos futuros a serem explorados.
Smart city is a very trendy concept today. It defines a type of urban development capable of reducing environmental impacts, enhancing current models of access to natural resources, better transportation systems, waste management, residential climatization and, above all, energy management (production and distribution). The huge data volume produced by smart cities offers a great opportunity to analyze, understand and improve the way cities work and grow. This explosion in the amount of digital information has elevated the importance of learning from data to a higher level. This document aims at describing a methodology for acquiring and exploring data from one of the most important pillars of smart cities: the public transportation system. How to acquire, store and use such data in order to provide to all stakeholders telematics services with high added value is the problem that is sought to solve in this work. Five telematics services proof of concept are proposed: assessment of current network coverage followed by the proposal of some new bus lines; indirect evaluation of buses’ passengers occupation during the day; geofence with geographical boundaries according to itineraries; speed alert and maintenance reminder services. The results are very coherent and promising, opening up a wide range of possible future work to be explored.
"GeoSparkSim: A Scalable Microscopic Road Network Traffic Simulator Based on Apache Spark". Master's thesis, 2019. http://hdl.handle.net/2286/R.I.53917.
Texto completoDissertation/Thesis
Masters Thesis Computer Engineering 2019
Huang, Kuo Cheng. "Traffic Simulation Model for Urban Networks: CTM-URBAN". Thesis, 2011. http://spectrum.library.concordia.ca/7041/7/Huang_MASc_S2011.pdf.
Texto completoLi, Cheng-Hsing y 李政興. "Interactive mixed traffic simulation in urban scenes". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/19404157852449317213.
Texto completo國立交通大學
多媒體工程研究所
102
We present an microscopic traffic animation system for simulate mixed traffic with four-wheeled cars and motorcycles in complex and interactive scenarios, including signalized road intersections, non-signalized roundabouts, and dynamical accident scenarios generated by user interaction. For this purpose, we introduce extended non-lane-based car-following model and non-lane-based lateral movement model instead of the conventional lane-based methods. Our non-lane-based models are able to simulate the movement and the decision-making of both cars and motorcycles, while solving some problems of mixed traffic simulation by lane-based methods. Therefore, we can demonstrate realistic mixed traffic with passenger cars, buses, trucks, and motorcycles.
Wu, Wei-Pin y 吳煒斌. "Solving Urban Traffic Jam Problems Using Simulation Method". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/xb3zd3.
Texto completoHo, Chia-Che y 何佳哲. "Simulation-based Control Strategies for Eliminating Urban Networks Traffic Jams". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/mu4qw2.
Texto completo國立宜蘭大學
電機工程學系碩士班
107
With the increasing population of the metropolitan area and the increase of vehicle usage, unexpected incidents occur during the rush hour, which leads to traffic congestion in the metropolitan area. If the traffic congestion can be slowed down quickly, it will be beneficial to the development of the metropolitan area. In this paper, the traffic network with high traffic flow is taken as the research object, and the formation of congestion in the whole road network is analyzed from a macro perspective. Then, the strategies of traffic signal control and forced vehicle direction control are designed through microcosm, and in order to optimize and speed up the traffic congestion resolution, corresponding strategies are applied in the congestion. In the initial stage of the simulation, Aimsun was used to build an 11*11 traffic network model. The ultimate carrying capacity of the traffic road was judged by visual characteristics, and then the maximum traffic flow could be found out. Then, by simulating the traffic incident at the center of the road, the process of traffic congestion was observed step by step, and the effective traffic data at each time interval were collected and analyzed, and different controls were collocated. The strategies include two kinds of policy: the ban traffic signal that is the mandatory vehicle direction and the control traffic signal phase time cycle. The former avoids traffic flow expanding to other areas, the latter accelerates traffic flow that has left congested areas and shortens the duration of temporary blocking traffic flow by traffic lights, and then reduces the vehicle load on the road through the experimental simulation results. It can effectively reduce the overall traffic density and road queue vehicles, which proves that this study can effectively eliminate the congestion caused by traffic accidents.
Xie, Bo-Yang y 謝博仰. "Simulation of Urban Traffic Congestion Strategies Using Cell Transmission Model". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9rjemn.
Texto completo國立宜蘭大學
電機工程學系碩士班
107
In recent years, urban transportation has developed rapidly, traffic congestion and traffic incidents under a limited road area have resulted in fuel consumption and increased human travel time. However, a lot of traffic congestion methods have been proposed. In this study, we propose two-level traffic congestion control strategies which according to the order of formation of traffic jams, are classified into three areas: A, B, and C to prevent traffic jams caused by accidents: (1) ban light is used to stop vehicles from driving in the direction of an accident, and (2) warning light is used to guide vehicles not to drive in the direction of an accident zone. In addition, we simulate a two-way traffic network by using CTM (Cell Transmission Model). In the road network simulation, we construct an 8 by 8 format traffic network model. All the vehicles entering the model are inferred from the distribution equation of the CTM in the road network, and all the routes in the road network are collected. Vehicle parameters include traffic density and congestion lane values. We also verify the effectiveness of our control strategy on the two-way traffic network. The simulation results show that are three key parameters can influence the traffic jams such as: the control strategy starting time, the rate of vehicle routes changed and the traffic density. Simulation results show our traffic congestion strategy is useful in urban traffic network systems.
Chen, Xiao. "Traffic Signal Control in Congested Urban Networks: Simulation-based Optimization Approach". Doctoral thesis, 2014. http://hdl.handle.net/10316/27072.
Texto completoO congestionamento tornou-se um fenómeno global, com particular relevância no caso das grandes áreas urbanas onde os engarrafamentos rodoviários são por norma uma preocupação diária. A gestão eficiente de planos sinaléticos é certamente um das formas mais rentáveis de lidar com este fenómeno. No entanto, as estratégias existentes para o controle de sinal semafóricos são por norma pouco poderosas na manipulação de redes congestionadas de tipologia reticulada e que sofrem de efeitos spillback. Melhorar a fiabilidade das nossas redes é atualmente reconhecido como um objetivo fundamental, tanto nos EUA como na Europa. Há uma ampla evidência sobre como a fiabilidade tempo de viagem é considerada por viajantes em uma variedade de decisões de viagem, tais como na escolha do horário de saída e da rota de viagem. Assim, operar as redes rodoviárias por forma a reduzir tanto a média como a variabilidade dos tempos de viagem seria muito valorizado pelos viajantes. No entanto, as atuais estratégias de gestão do tráfego urbano são normalmente formuladas de modo a apenas melhorar os indicadores de desempenho de primeira ordem (como é o casa dos tempos de viagem esperados ou as velocidades esperadas nos eixos). O principal desafio na abordagem de introduzir objetivos de fiabilidade em problemas de otimização de transporte tradicionais é a necessidade de encontrar uma aproximação analítica útil e precisa para a distribuição do tempo de viagem, ou seja, para os seus momentos de primeira e de segunda ordem. A complexidade das dependências entre os eixos da rede e as próprias relações espaço-temporais, torna a modelação analítica exata da rede rodoviária um desafio. Em particular quando se pretende modelar indicadores de performance ao nível dos percursos tomados pelos condutores, de forma a refletir as experiências de viagem dos condutores. Este trabalho propõe por isso novas estratégias de controlo semafórico, que conseguem lidar com os desafios indicados e que são particularmente úteis para redes urbanas congestionadas de grande escala. Nesta tese, um modelo de otimização baseada em simulação (SO) é usado para tratar problemas semafóricos de controle de tráfego. Os simuladores microscópicos descrevem em detalhe as interações entre o desempenho do veículo, o comportamento dos condutores e a infraestrutura de transporte subjacente. Eles podem contribuir para o desenvolvimento de estratégias de gestão de tráfego, proporcionando estimativas detalhadas do desempenho do sistema que podem ser usadas tanto no planeamento como na avaliação da performance de redes urbanas. No entanto, para assegurar a eficiência computacional, é necessária lidar com uma aproximação analítica da função objetivo. Para isso, desenvolvemos diferentes formulações de fiabilidade do tempo de viagem, com base em distribuições tanto do tempo de viagem nos eixos como do tempo de viagem no percurso ou viagem. Essas formulações foram posteriormente usadas no desenvolvimento de estratégias que preenchem os requisitos em termos da fiabilidade dos tempos de viagem. Desenvolveu-se ainda um algoritmo de controle reactivo de semáforos baseado em simulação, de modo a ajustar os planos semafóricos dinamicamente de acordo com as condições de tráfego em tempo real. A estratégia de fiabilidade para o controle semafórico proposta nesta tese é aplicada tanto à rede do centro da cidade de Lausanne como à rede completa da mesma cidade. O algoritmo de controle semafórico reactivo com base em simulação é aplicado a uma rede urbana reticulada, com elevados níveis de tráfego, na zona leste da Ilha de Manhattan (Nova York, EUA). Em ambos os casos, os métodos propostos obtêm planos semafóricos com melhor desempenho em termos das várias medidas de desempenho usadas.
Macedo, José Luís Pereira. "An integrated framework for multi-paradigm traffic simulation". Master's thesis, 2013. http://hdl.handle.net/10216/72541.
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