Download or read book Evaluation of Origin destination Matrix Estimation Techniques to Support Aspects of Traffic Modeling written by Michael David Anderson and published by . This book was released on 2014 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Origin destination Matrix Estimation Techniques to Support Aspects of Traffic Modeling written by Jeffrey Paul Wilson and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimation and Prediction of Origin destination Matrices for I 66 written by Weihao Yin and published by . This book was released on 2011 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project uses the Box-Jenkins time-series technique to model and forecast the traffic flows and then uses the flow forecasts to predict the origin-destination matrices. First, a detailed analysis was conducted to investigate the best data correction method. Four spatial correction procedures were examined for non-incident related detector data. The first approach, temporal correction, exploited the inherent temporal trend of historical traffic. The spatial correction based on linear regression (LR) - a proposed modification of a previous approach - uses the relationship between the individual detector flow and station flow. The third approach proposed in this study is also a spatial correction method. A unique feature of the proposed spatial correction procedure was incorporation of lane use percentage into the correction process through kernel regression (KR). As a comparison benchmark, the correction method based on lane distribution (LD) developed by previous researchers was included as the fourth method. To comprehensively compare the correction procedures, both systematic evaluation and random-error evaluation were conducted. After the results of systematic evaluation were analyzed, it was found that adaption was needed for the KR and LD approaches. Specifically, the individual lane flows provided by the detectors on particular general purpose lanes produced more accurate estimates. The two correction procedures (kernel regression and lane distribution) were revised in light of this finding and their station flow estimates were compared to those of the temporal correction and the LR approach at five error levels, which was considered as the random-error evaluation. After applying the temporal correction method to the data set, the station flow series was modeled using the Box-Jenkins time-series modeling framework. The station flow series was successfully modeled by an MA(2) model using the Box-Jenkins time series technique. It enjoys an MAE of 344.53 and MAPE of 7.07%. The limitation is that different models are needed for each station and the model may be different for a different time period. However, once the model is fitted, it can be used to forecast the traffic hourly.

Download or read book Urban Public Transport Systems Innovation in the Fourth Industrial Revolution Era written by Trynos Gumbo and published by Springer Nature. This book was released on 2022-04-02 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the physical and electronic integration of innovative urban public transport systems in seven metropolitan cities in South Africa and Zimbabwe in the era of the Fourth Industrial Revolution (Industry 4.0). The book also highlights how collaborative engagement can improve new transport projects in cities of the Global South. It demonstrates how integration concerns remain in transport infrastructure projects in cities of the developing countries. Consequently, in order to strengthen the emerging and promising economies of these cities, there is a need for efficient, integrated, reliable and affordable public transport systems. The book explains that plans to deliver innovative transport systems in the Global South need to be well coordinated and managed to yield physically and electronically integrated systems.

Download or read book Evaluation of Methods for Estimating Origin destination Matrices from Traffic Count Data for Transit Systems written by Dietmar Bosserhoff and published by . This book was released on 1986 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use of San Francisco Bay Area Rapid Transit District passenger count data to estimate origin-destination matrices.

Download or read book Contributions to the Traffic Matrix Problem written by Dimitri Marakov and published by . This book was released on 2007 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis addresses the traffic matrix estimation problem. Knowledge about the origin-destination (OD) traffic matrix (TM) allows us to solve problems in network engineering; the OD traffic matrix gives us a valuable information about who is communicating with whom in a network, at any given time. Traffic analysis, based on detailed packet or flow level measurements, usually not available throughout a large network due to hardware limitations or/and security reasons. An alternative approach is to use mathematical and statistical techniques for the estimation using the incomplete data accessible via SMNP. In my PhD thesis I describe the traffic data collection and, perform a critical evaluation of existing and novel methods for TM estimation on the real and synthetic data, and test the statistical and non-statistical methods. I discuss the weaknesses and strengths of the various methods, and highlight differences in the results for the simulated traffic and the real one obtained from European and American subnetworks. This research also addresses the variability of Internet traffic in backbone networks is essential for the creation of the better traffic model (vital for the estimation techniques), to better plan and manage existing networks, as well as to design next generation networks. I show the difference between the real traffic in high-bandwidth networks with the classic and most commonly used traffic models, propose a high-bandwidth TM simulation technique which can help with the evaluation of the traffic matrix algorithms in the case when the real TM necessary for the algorithms verification is difficult to obtain.

Download or read book New Developments in Modelling Travel Demand and Urban Systems written by Gijsbertus R. M. Jansen and published by . This book was released on 1979 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Improving the Estimation of Travel Demand for Traffic Simulation written by and published by . This book was released on 2005 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many current traffic management schemes are tested and implemented using traffic simulation. An Origin- Destination (OD) matrix is an ideal input for such simulations. The underlying travel demand pattern produces observed link counts. One could use these counts to reconstruct the OD matrix. An offline approach to estimate a static OD matrix over the peak period for freeway sections using these counts is proposed in this research. Almost all the offline methods use linear models to approximate the relationship between the on-ramp and off-ramp counts. Previous work indicates that the use of a traffic flow model embedded in a search routine performs better than these linear models. In this research, that approach is enhanced using a microscopic traffic simulator, AIMSUN, and a gradient-based optimization routine, MINOS, interfaced to estimate an OD matrix. The problem is highly non-linear and non-smooth, and the optimization routine finds multiple local minima, but cannot guarantee a global minima. However, with a number of starting "seed" matrices, an OD matrix with a good fit in terms of reproducing traffic counts can be estimated. The dominance of the mainline counts in the OD estimation and an identifiability issue is indicated from the experiments. The quality of the estimates improves as the specification error, introduced due to the discrepancy between AIMSUN and the real-world process that generates the on-ramp and off-ramp counts, reduces.

Download or read book Urban Informatics written by Wenzhong Shi and published by Springer Nature. This book was released on 2021-04-06 with total page 941 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book is the first to systematically introduce the principles of urban informatics and its application to every aspect of the city that involves its functioning, control, management, and future planning. It introduces new models and tools being developed to understand and implement these technologies that enable cities to function more efficiently – to become ‘smart’ and ‘sustainable’. The smart city has quickly emerged as computers have become ever smaller to the point where they can be embedded into the very fabric of the city, as well as being central to new ways in which the population can communicate and act. When cities are wired in this way, they have the potential to become sentient and responsive, generating massive streams of ‘big’ data in real time as well as providing immense opportunities for extracting new forms of urban data through crowdsourcing. This book offers a comprehensive review of the methods that form the core of urban informatics from various kinds of urban remote sensing to new approaches to machine learning and statistical modelling. It provides a detailed technical introduction to the wide array of tools information scientists need to develop the key urban analytics that are fundamental to learning about the smart city, and it outlines ways in which these tools can be used to inform design and policy so that cities can become more efficient with a greater concern for environment and equity.

Download or read book The Traffic Assignment Problem written by Michael Patriksson and published by Courier Dover Publications. This book was released on 2015-01-19 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph provides both a unified account of the development of models and methods for the problem of estimating equilibrium traffic flows in urban areas and a survey of the scope and limitations of present traffic models. The development is described and analyzed by the use of the powerful instruments of nonlinear optimization and mathematical programming within the field of operations research. The first part is devoted to mathematical models for the analysis of transportation network equilibria; the second deals with methods for traffic equilibrium problems. This title will interest readers wishing to extend their knowledge of equilibrium modeling and analysis and of the foundations of efficient optimization methods adapted for the solution of large-scale models. In addition to its value to researchers, the treatment is suitable for advanced graduate courses in transportation, operations research, and quantitative economics.

Download or read book Improving the Estimation of Travel Demand for Traffic Simulation written by Yao Wu and published by . This book was released on 2004 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report examined several methods for estimating Origin-Destination (OD) matrices for freeways using loop detector data. Least squares based methods were compared in terms of both off-line and on-line estimation. Simulated data and observed data were used for evaluating the static and recursive estimators. For off-line estimation, four fully constrained least squares methods were compared. The results showed that the variations of a constrained least squares approach produced more efficient estimates. For on-line estimation, two recursive least squares algorithms were examined. The first method extends Kalman Filtering to satisfy the natural constraints of the OD split parameters. The second was developed from sequential quadratic programming. These algorithms showed different capabilities to capture an abrupt change in the split parameters. Practical recommendations of the choice of different algorithms are given.

Download or read book Performance Evaluation and Planning Methods for the Next Generation Internet written by Andre Girard and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: GERAD celebrates this year its 25th anniversary. The Center was created in 1980 by a small group of professors and researchers of HEC Montreal, McGill University and of the Ecole Polytechnique de Montreal. GERAD's activities achieved sufficient scope to justify its conversion in June 1988 into a Joint Research Centre of HEC Montreal, the Ecole Polytechnique de Montreal and McGill University. In 1996, the U- versite du Quebec a Montreal joined these three institutions. GERAD has fifty members (professors), more than twenty research associates and post doctoral students and more than two hundreds master and Ph.D. students. GERAD is a multi-university center and a vital forum for the devel- ment of operations research. Its mission is defined around the following four complementarily objectives: • The original and expert contribution to all research fields in GERAD's area of expertise; • The dissemination of research results in the best scientific outlets as well as in the society in general; • The training of graduate students and post doctoral researchers; • The contribution to the economic community by solving important problems and providing transferable tools.

Download or read book Estimation of an Origin destination Trip Table Based on Observed Link Volumes and Turning Movements written by United States. Federal Highway Administration. Traffic Systems Division and published by . This book was released on 1980 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Urban Transportation Networks written by Yosef Sheffi and published by Prentice Hall. This book was released on 1984 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Multi Agent Transport Simulation MATSim written by Andreas Horni and published by Ubiquity Press. This book was released on 2016-08-10 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: The MATSim (Multi-Agent Transport Simulation) software project was started around 2006 with the goal of generating traffic and congestion patterns by following individual synthetic travelers through their daily or weekly activity programme. It has since then evolved from a collection of stand-alone C++ programs to an integrated Java-based framework which is publicly hosted, open-source available, automatically regression tested. It is currently used by about 40 groups throughout the world. This book takes stock of the current status. The first part of the book gives an introduction to the most important concepts, with the intention of enabling a potential user to set up and run basic simulations. The second part of the book describes how the basic functionality can be extended, for example by adding schedule-based public transit, electric or autonomous cars, paratransit, or within-day replanning. For each extension, the text provides pointers to the additional documentation and to the code base. It is also discussed how people with appropriate Java programming skills can write their own extensions, and plug them into the MATSim core. The project has started from the basic idea that traffic is a consequence of human behavior, and thus humans and their behavior should be the starting point of all modelling, and with the intuition that when simulations with 100 million particles are possible in computational physics, then behavior-oriented simulations with 10 million travelers should be possible in travel behavior research. The initial implementations thus combined concepts from computational physics and complex adaptive systems with concepts from travel behavior research. The third part of the book looks at theoretical concepts that are able to describe important aspects of the simulation system; for example, under certain conditions the code becomes a Monte Carlo engine sampling from a discrete choice model. Another important aspect is the interpretation of the MATSim score as utility in the microeconomic sense, opening up a connection to benefit cost analysis. Finally, the book collects use cases as they have been undertaken with MATSim. All current users of MATSim were invited to submit their work, and many followed with sometimes crisp and short and sometimes longer contributions, always with pointers to additional references. We hope that the book will become an invitation to explore, to build and to extend agent-based modeling of travel behavior from the stable and well tested core of MATSim documented here.

Download or read book 2013 6th International Conference on BioMedical Engineering and Informatics BMEI 2013 written by and published by DEStech Publications, Inc. This book was released on 2014-01-07 with total page 1269 pages. Available in PDF, EPUB and Kindle. Book excerpt: SPBEI 2013 aims to be an excellent platform to facilitate international exchange of state-ofthe- art research and practice in image, video, and signal processing, biomedical engineering, informatics, and their cross-intersection to catalyze innovative research ideas and to dissimilate new scientific discoveries. The nature of the research demands collaboration in medicine, biology, physics, engineering, computer science, and statistics; and SPBEI attempts to expedite and strengthen the exploration and systemization of interdisciplinary knowledge. This year, the conference received a large number of submissions around the globe, and all papers have been rigorously reviewed by a large number of peer reviewers who have spent tremendous amount of time and effort on the evaluations, with each paper receiving three to six reviews. We would like to thank all those who submitted papers for considerations, and we extend our sincere gratitude to all those who devoted their time and effort professionally to ensuring the high standards of the technical program, including the authors, committee members, peer reviewers, and session chairs.

Download or read book Deriving Origin destination Information from Routinely Collected Traffic Counts written by Victor K. Chan and published by . This book was released on 1980 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: