Download or read book Uncertainty in Travel and Emissions Models written by Caroline Jane Rodier and published by . This book was released on 2000 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Uncertainty in Integrated Land Use transport Models written by Anant Pradhan and published by . This book was released on 2002 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report examines the impact of uncertainty in the land use component of a partially integrated land use-transportation modeling system called UrbanSim. Outputs from the land use model (LUM) act as inputs for a traditional 4-step travel demand model (TDM), and travel times from the traffic-assignment stage of the TDM are fed forward into the subsequent year's LUM. This work examines the propagation of uncertainty across model stages as well as at each model stage over time. A factorized design approach is used to model uncertainty in demographic inputs to the LUM, as well as uncertainty in various model parameters. Results suggest that while several model inputs may affect model outputs in the short run, only those inputs having a cumulative effect are likely to have a significant impact on outputs in the long run. Results also suggest that uncertainty in model outputs may increase for the first few years for which the model is run, as modified inputs send shocks through the urban system. However, the uncertainty level seems to come down in later years, as jobs, households, and developers respond to changed input conditions.
Download or read book Improving Transportation Data for Mobile Source Emission Estimates written by Arun Chatterjee and published by Transportation Research Board. This book was released on 1997 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Mobile Source Emissions written by National Research Council and published by National Academies Press. This book was released on 2000-07-14 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mobile Source Emissions Factor (MOBILE) model is a computer model developed by the U.S. Environmental Protection Agency (EPA) for estimating emissions from on-road motor vehicles. MOBILE is used in air-quality planning and regulation for estimating emissions of carbon monoxide (CO), volatile organic compounds (VOCs), and nitrogen oxides (NOx) and for predicting the effects of emissions-reduction programs. Because of its important role in air-quality management, the accuracy of MOBILE is critical. Possible consequences of inaccurately characterizing motor-vehicle emissions include the implementation of insufficient controls that endanger the environment and public health or the implementation of ineffective policies that impose excessive control costs. Billions of dollars per year in transportation funding are linked to air-quality attainment plans, which rely on estimates of mobile-source emissions. Transportation infrastructure decisions are also affected by emissions estimates from MOBILE. In response to a request from Congress, the National Research Council established the Committee to Review EPA's Mobile Source Emissions Factor (MOBILE) Model in October 1998. The committee was charged to evaluate MOBILE and to develop recommendations for improving the model.
Download or read book Input Parameter and Spatial Uncertainty in a Fully Integrated Land Use and Transportation Model written by Michael James Clay and published by . This book was released on 2005 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Expertise and Uncertainty in Environmental Regulation written by Louise Wells Bedsworth and published by . This book was released on 2002 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mathematics of Uncertainty Modeling in the Analysis of Engineering and Science Problems written by Chakraverty, S. and published by IGI Global. This book was released on 2014-01-31 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book provides the reader with basic concepts for soft computing and other methods for various means of uncertainty in handling solutions, analysis, and applications"--Provided by publisher.
Download or read book Representing Freight in Air Quality and Greenhouse Gas Models written by Louis Harold Browning and published by Transportation Research Board. This book was released on 2010 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report presents an evaluation of the current methods used to generate air emissions information from all freight transportation activities and discusses their suitability for purposes such as health and climate risk assessments, prioritization of emission reduction activities (e.g., through State Implementation Plans), and public education. The report is especially valuable for (1) its identification of the state of the practice, gaps, and strengths and limitations of current emissions data estimates and methods and (2) its conceptual model that offers a comprehensive representation of freight activity by all transportation modes and relationships between modes. This report will better inform the near-term needs of public and private stakeholders regarding the quality of emissions data and guide future research that links freight activities with air emissions."--pub. desc.
Download or read book Reauthorization of TEA 21 written by United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Transportation, Infrastructure, and Nuclear Safety and published by . This book was released on 2003 with total page 1408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beyond Uncertainty written by Caroline Rodier and published by . This book was released on 2007 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concerned citizens across the United States are increasingly asking officials about the effects of proposed new highways and their alternatives, such as transit and road pricing, on how their communities will grow, the air their children will breathe, and the amount of time they will have to spend in traffic commuting to work. It is widely acknowledged, however, that the models used to assess these effects have limited accuracy and sensitivity to alternatives to highway expansion. This study attempts to move beyond the issues of uncertainty in models used to forecast the travel, land use, and air quality effects of transportation projects and policies by (1) reviewing the literature on error and uncertainty in travel and land use models to understand key sources, likely confidence bounds, and potential biases; (2) conducting interviews with modeling experts to gain insight into how uncertain models may be improved and better applied in transportation studies; and (3) presenting a series of cases studies that illustrate innovative and, possibly, more credible approaches to modeling given different study objectives, model capability, and knowledge of model uncertainty.
Download or read book Applying an Integrated Model to the Evaluation of Travel Demand Management Policies in the Sacramento Region written by and published by . This book was released on 2001 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes how an advanced integrated land use and transportation model (the Sacramento MEPLAN) was used to evaluate transit and supportive land use and pricing policies. The model represents the effect that the transportation system has on land use. The interaction of land use and transportation needs to be represented. Otherwise, there may be a biased analysis of transit and highway alternatives. The Sacramento MEPLAN features a more comprehensive representation of induced travel effects, thus increasing sensitivity to policies such as transit, land use measures and pricing policies.
Download or read book State and Federal Standards for Mobile Source Emissions written by National Research Council and published by National Academies Press. This book was released on 2006-06-15 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emissions from mobile sources contribute significantly to air pollution in the United States. Such sources include cars and light- and heavy-duty trucks; diesel-powered cranes, bulldozers, and tractors; and equipment such as lawnmowers that run on small gasoline engines. The role of state versus federal government in establishing mobile-source emissions standards is an important environmental management issue. With this in mind, Congress called on EPA to arrange an independent study of the practices and procedures by which California develops separate emissions standards from the federal government and other states choose to adopt the California standards. The report provides an assessment of the scientific and technical procedures used by states to develop or adopt different emissions standards and a comparison of those policies and practices with those used by EPA. It also considers the impacts of state emissions standards on various factors including compliance costs and emissions. The report concludes that, despite the substantial progress in reducing emissions from mobile sources nationwide, more needs to be done to attain federal air-quality standards in many parts of the country. Additionally, California should continue its pioneering role in setting emissions standards for cars, trucks, and off-road equipment.
Download or read book Computer based Modelling and Optimization in Transportation written by Jorge Freire Sousa and published by Springer Science & Business Media. This book was released on 2014-02-20 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together works resulting from research carried out by members of the EURO Working Group on Transportation (EWGT) and presented during meetings and workshops organized by the Group under the patronage of the Association of European Operational Research Societies in 2012 and 2013. The main targets of the EWGT include providing a forum to share research information and experience, encouraging joint research and the development of both theoretical methods and applications, and promoting cooperation among the many institutions and organizations which are leaders at national level in the field of transportation and logistics. The primary fields of interest concern operational research methods, mathematical models and computation algorithms, to solve and sustain solutions to problems mainly faced by public administrations, city authorities, public transport companies, service providers and logistic operators. Related areas of interest are: land use and transportation planning, traffic control and simulation models, traffic network equilibrium models, public transport planning and management, applications of combinatorial optimization, vehicle routing and scheduling, intelligent transport systems, logistics and freight transport, environment problems, transport safety, and impact evaluation methods. In this volume, attention focuses on the following topics of interest: · Decision-making and decision support · Energy and Environmental Impacts · Urban network design · Optimization and simulation · Traffic Modelling, Control and Network Traffic Management · Transportation Planning · Mobility, Accessibility and Travel Behavior · Vehicle Routing
Download or read book Working with Dynamic Crop Models written by Daniel Wallach and published by Elsevier. This book was released on 2006-05-10 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical models are being used more and more widely to study complex dynamic systems (global weather, ecological systems, hydrological systems, nuclear reactors etc. including the specific subject of this book, crop-soil systems). The models are important aids in understanding, predicting and managing these systems. Such models are complex and imperfect. One fundamental research direction is to seek a better understanding of how these systems function, and to propose mathematical expressions embodying that understanding. However, this is not sufficient. It is also essential to have tools (often mathematical and statistical methods) to aid in developing, improving and using the models built from those equations. The book is specifically concerned with the application of methods to crop models, but much of the material is also applicable to dynamic system models in other fields. The goal of this book is to fill that gap.* State-of-the-art methods explained simply and illustrated specifically for crop models* Parameter estimation – applying statistical methods to the complex case of crop models, including Bayesian methods * Includes model evaluation, understanding and estimating prediction error* Offers a unique data assimilation by using the Kalman filter and beyond
Download or read book 107 2 Hearings Reauthorization Of TEA 21 S Hrg 107 668 Part 1 January 24 2002 Etc written by and published by . This book was released on 2004 with total page 1408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Curbing Gridlock Commissioned papers written by National Research Council (U.S.). Transportation Research Board. Committee for Study on Urban Transportation Congestion Pricing and published by Transportation Research Board. This book was released on 1994 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Federal Highway Administration and Federal Transit Administration requested that the Transportation Research Board and the Commission on Behavioral and Social Sciences and Education of the National Research Council conduct a study of congestion pricing for congestion management. To conduct this study, the National Research Council established the Committee for Study on Urban Transportation Congestion Pricing. The committee's deliberations were supplemented by liaison representatives from several groups concerned about the benefits and costs of congestion pricing. After a review of the literature, and drawing from its expertise, the committee commissioned papers on a variety of topics. Volume 1 contains the committee's overview of the material contained in the commissioned papers, its conclusions, and its recommendations regarding the potential of congestion pricing, the need for evaluation of early demonstrations, and other research needs. Volume 2 provides a rich array of information about individual case studies from around the nation and thoughtful analyses by individual scholars about many of the critical issues surrounding congestion pricing., as revised by their authors after the symposium.
Download or read book Carbon Footprint and the Industrial Life Cycle written by Roberto Álvarez Fernández and published by Springer. This book was released on 2017-05-28 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book analyzes the relationship between large-scale industrial activity and the carbon footprint, and provides a theoretical framework and tools to calculate the carbon footprint of industrial activities at every stage of their life cycles, including urban-planning master plans, recycling activities, project and building stages as well as managing and manufacturing. Discussing the main preventative and corrective measures that can be utilized, it includes case studies, reports on technological developments and examples of successful policies to provide inspiration to readers. This book collects the contributions of authors from four continents, in order to analyze from as many as possible points of view and using many different approaches, the problem of sustainability in today’s globalized world.
