Download or read book Emissions Reduction Through Better Traffic Management written by and published by . This book was released on 2001 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this study were to: (1) evaluate a new low-cost approach for measuring on-road tailpipe emissions of highway vehicles; (2) investigate factors that affect the amount and variability of on-road emissions, using statistical methods; and (3) devise and demonstrate methods for designing and conducting observational experiments that realistically evaluate pollution prevention strategies for on-road vehicles. Portable instruments were used for measuring carbon monoxide (CO), nitric oxide (NO), and hydrocarbon (HC) emissions and vehicle activity (e.g., vehicle speed, engine parameters) on a second-by-second basis. Data collection, quality assurance, reduction, and analysis protocols were developed. Field data collection occurred in a pilot and an evaluation phase. In total, over 1,200 one-way trips were made with more than 20 vehicles, 4,000 vehicle-miles traveled, 160 hours of data, and 10 drivers. The pilot study was used to identify key factors influencing on-road emissions and as input to the design of the evaluation study. In the evaluation study, data were collected intensively with a small number of vehicles on two corridors before and after signal timing and coordination changes were implemented. For the first corridor, changes in signal timing and coordination did not result in a significant change in traffic flow or emissions. However, substantial reductions in emissions were estimated for uncongested versus congested traffic flow when comparing travel in the same direction at different times of day. For the second corridor, there were significant improvements in traffic flow and some reduction in emissions for three of the four time period and travel direction combinations evaluated. The impact of signal timing and coordination changes with respect to non-priority movements involving cross-streets was evaluated. For the first corridor, there was no statistically significant observed change in emissions for non-priority movements. For the second corridor, there typically was a decrease in average speed and an increase in emissions for non-priority movements; however, many of the observed changes were not statistically significant. The study also demonstrated other analysis methods, including: (a) macro-scale analysis of trip average emissions and traffic parameters; (b) micro-scale analysis of second-by-second emissions and vehicle operation; (c) mesoscale analysis of modal emission rates; and (d) spatial analysis of emissions at specific locations along the corridors. Both statistical and theoretical-based approaches were evaluated. The implications of the study results for pollution prevention strategies are discussed. Conclusions are presented regarding instrumentation, protocols, analysis techniques, and case study-specific findings. Recommendations are given regarding future applications of on-board measurements.

Download or read book Traffic Congestion Mitigation as an Emissions Reduction Strategy written by Alexander York Bigazzi and published by . This book was released on 2011 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Policy-makers, transportation researchers, and activists often assume that traffic congestion mitigation results in reduced vehicle emissions without proper justification or quantification of the benefits. If congestion mitigation is going to be tied to air quality goals, a better understanding of the impacts of traffic congestion on motor vehicle emissions is needed. This research addresses that need by investigating under which circumstances the commonly held assumption linking congestion mitigation to emissions reductions is valid. We develop and apply a mathematical framework to study the trade-offs between vehicle efficiency and travel demand that accompany travel speed changes. While the exact relationships among emissions, travel speed, and travel demand vary with location and pollutant, several consistent results arise. The potential for marginal emissions rate reductions through average travel speed adjustments is small for speeds between about 25 and 70 mph. Emissions rate sensitivity to speed increases with the fraction of heavy-duty vehicles and for certain pollutants (gaseous hydrocarbons and particulate matter), and decreases with the fraction of advanced-drivetrain vehicles, such as electric and gas-electric hybrid vehicles. But travel volume is also a key consideration for the total emissions impacts of congestion and congestion mitigation. While travel speed increases are generally expected to increase efficiency, they are also expected to increase vehicle travel volume as a result of induced demand. To explore efficiency and volume trade-offs we look at emissions break-even conditions for average speed and travel demand elasticity. Depending on the pollutant and the vehicle fleet, total emissions are only expected to decrease with increasing travel speed for initial conditions of both low demand elasticity and low average speed. Thus, higher levels of congestion do not necessarily increase emissions, nor will congestion mitigation inevitably reduce emissions. This result includes projects that seek to increase vehicle throughput from existing roadway supply through better traffic management and operations. Congestion mitigation through reduced vehicle volumes, on the other hand, presents the opportunity for additive emissions benefits through efficiency improvements and total Vehicle Miles Traveled (VMT) reductions. Comparing capacity-based congestion mitigation strategies with alternative emissions reduction strategies we show that where emissions reductions are possible through speed increases, the emissions benefits are likely to be more easily and cost-effectively attained by other strategies. A sketch analysis of vehicle-class segregated facilities shows that truck-only lane strategies consistently out-perform general-purpose/mixed-flow lane strategies in terms of emissions reductions. An analysis of several congestion-related performance measures shows that for reflecting emissions impacts, VMT is an essential component of performance. Thus, alternative congestion metrics such as total/excess travel distance and travel time are preferable emissions performance indicators to speed or distance-normalized delay. The Travel Time Index, in particular, poorly reflects emissions changes on congested roadways. This thesis offers several original contributions to the body of knowledge regarding congestion and emissions. First, it describes a parsimonious conceptual framework for assessing the effect of congestion on emissions. Then from that framework, several simple and original equations are presented which can be used for sketch-level planning to estimate emissions impacts from congestion mitigation. Finally, application of the framework provides quantitative support for the decoupling of congestion and emissions mitigations.

Download or read book Sustainable Transport Policies written by European Conference of Ministers of Transport and published by OECD Publishing. This book was released on 2000-09-05 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: - Substantial progress has been made in improving the sustainability of transport in Europe in a number of areas and is reported in this paper. Nevertheless there remain important problems and challenges: - unsustainable rates of traffic growth ...

Download or read book Reducing Carbon Emissions from Transport written by Great Britain: Parliament: House of Commons: Environmental Audit Committee and published by The Stationery Office. This book was released on 2006-08-07 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Committee's report examines the challenges involved in efforts to reduce carbon emissions from the UK transport sector and makes recommendations to improve future progress, as part of its overall priority for the current Parliament of focusing on climate change issues. Topics discussed include: the Government's strategic priorities; measures to reduce carbon emissions from road transport, trains, water freight and aviation; emissions from developing economies; the future price and availability of oil. This volume contains a range of oral and written evidence taken by the Committee in the course of its inquiry, including contributions from officials from the Department for Transport, Transport for London, the Environment Agency, Transport 2000 and Sustrans, as well as from environmental groups and from representatives from the motoring, aviation, rail, freight transport and shipping industries.

Download or read book Evaluation of Mobile Source Greenhouse Gas Emissions for Assessment of Traffic Management Strategies written by Qinyi Shi and published by . This book was released on 2011 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmentally Conscious Transportation written by Myer Kutz and published by John Wiley & Sons. This book was released on 2008-03-03 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fifth volume of the Wiley Series in Environmentally Conscious Engineering, Environmentally Conscious Transportation provides a foundation for understanding and implementing methods for reducing the environmental impact of a wide range of transportation modes, from private automobiles (with a separate chapter on biofuels) to heavy trucks and buses to rail and public transportation systems to aircraft. Each chapter has been written by one or more experts who, based on their hands-on field experience, present relevant practical and analytic techniques for enhancing the integrity and reliability of transportation vehicles and infrastructure, as well as for measuring and limiting the pollution caused by transportation activities. Moreover, the book explains how to satisfy key business objectives, such as maximizing profits, while meeting environmental objectives.

Download or read book Using Transportation Control Measures to Reduce Motor Vehicle Emissions written by and published by DIANE Publishing. This book was released on 1994 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the use of Transportation Control Measures to control mobile source emissions. TCMs are programs or activities that states & localities can implement to encourage the traveling public to rely less on the automobile or to use the automobile more efficiently. Charts & tables.

Download or read book Intercity Transport and Climate Change written by Yoshitsugu Hayashi and published by Springer. This book was released on 2014-11-25 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: While intercity passenger transport counts for about 2% of the total passenger transport volume the share of the total passenger kilometers traveled is estimated more than one third. In many countries the major part of intercity transport is performed by car and air and as a result, the contribution to the carbon footprint is substantially higher than the share of overall passenger transport performance. This creates a challenge to develop a sustainable organization of intercity transport which requires a true joint effort of policy makers, industry sectors and households. This presupposes that all options for reducing the carbon footprint of the transport modes – car, air and rail – are fully exploited through modern propulsion technology, use of regenerative energy and efficient organization of transport processes. Basic conditions for meeting this requirement are an incentive compatible public framework of regulation, taxation, charging and education, the private willingness to adjust to new behavioral patterns and a consequent push of technological progress towards energy and CO2 savings. This book begins with an international comparison of intercity transport and the current state of greenhouse gas emissions (GHG) of this transport segment. A focus is given to comparing the situation in the EU, the US and Japan while describing the more recent development of intercity transport in China, followed by an analysis of intercity transport policies and their contribution to meet the global climate change issues. This book will be of interest to researchers in transportation economics and policy, as well as civil engineering and planning.

Download or read book Leveraging Demand Capacity Balancing to Reduce Air Traffic Emissions and Improve Overall Network Performance written by Jan-Rasmus Künnen and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Next to the development of more energy-efficient aircraft and alternative jet fuels, improvements in air traffic management (ATM) constitute a key lever to reduce aviation emissions in the future. In this paper, we analyse two demand and capacity management mechanisms that aim at improving flight efficiency and reducing emissions in European ATM: network-oriented capacity decisions and trajectory-independent airport- pair charging. Today, many flights in Europe are diverted from shorter trajectories due to insufficient capacities in the network. We therefore propose to explicitly include both network effects and emissions in order to make better, network-oriented capacity decisions. On the demand side, the current airspace charging scheme in some cases unintentionally incentivises airspace users (AUs) to fly on longer trajectories to avoid countries with high en-route charges. We therefore analyse the effect of a trajectory- independent airport-pair charging scheme (instead of country-specifi c airspace charges) that align the incentive of AUs with the environment when making their trajectory choice. Both measures aim at reducing the costs created for the network (in terms of delay and rerouting cost) and the environment. The mechanisms are tested on a realistically-sized case study covering 3,000-4,000 flights in large parts of Western European airspace. We fi nd that central capacity planning can reduce variable network cost by 21% and emissions from detours by almost 64%. Furthermore, airport-pair charging can save almost 11% of variable network cost and up to 320,000 tons of CO2 emissions if accompanied by capacity changes that reflect the shift in demand towards shorter trajectories.

Download or read book Intelligent Transportation Systems written by Robert Gordon and published by Springer. This book was released on 2015-11-02 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intelligent Transportation Systems: Functional Design for Economical and Efficient Traffic Management provides practical guidance on the efficient use of resources in the design of ITS. The author explains how functional design alternatives can meet project objectives and requirements with optimal cost effectiveness and clarifies how transportation planning and traffic diversion principles relate to functional ITS device selections and equipment locations. Methodologies for translating objectives to functional device types, determining device deployment densities and determining the best placement of CCTV cameras and message signs are provided, as are models for evaluating the benefits of design alternatives based on traffic conditions. Readers will learn how to reduce recurrent congestion, improve incident clearance time in non-recurrent congestion, provide real-time incident information to motorists, and leverage transportation management center data for lane control through important new active transportation and demand management (ATDM) methods. Finally, the author examines exciting developments in connected vehicle technologies, exploring their potential to greatly improve safety, mobility and energy efficiency. This resource will greatly benefit all ITS designers and managers and is of pivotal importance for operating agencies performing evaluations to justify operational funding and system expansions.

Download or read book Reduction of CO2 Emissions from Road Transport in Cities written by Michal Markiewicz and published by Springer. This book was released on 2016-11-05 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Michal Markiewicz presents the outcomes of his research regarding the influence of dynamic route guidance system on overall emission of carbon dioxide from road transport in rural areas. Sustainable transportation in smart cities is a big challenge of our time, but before electric vehicles replace vehicles that burn fossil fuels we have to think about traffic optimization methods that reduce the amount of greenhouse gas emissions.

Download or read book Growing Green written by Uwe Deichmann and published by World Bank Publications. This book was released on 2013-04-12 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Economic Benefits of Climate Action shows how well-designed policies can reduce the ECA region s carbon footprint while promoting growth opportunities and protecting the living standards of lower income households.

Download or read book Aviation and the Environment NextGen and Research and Development are Keys to Reducing Emissions and Their Impact on Health and Climate written by Gerald L. Dillingham and published by DIANE Publishing. This book was released on 2008-10 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collaboration between the fed. gov¿t. and the aviation industry has led to reductions in aviation emissions (AE), but growing air traffic has partially offset these reductions. Various fed. agencies are working to increase the efficiency, safety, and capacity of the nat. airspace system and at the same time reduce AE, in part, by transforming the current air traffic control system to the Next Generation Air Transp. System (NextGen). This effort involves new technologies and air traffic procedures that can reduce AE and incorporates R&D on emissions-reduction technologies. This testimony addresses: (1) the scope and nature of AE; (2) the status of selected key fed. efforts to reduce AE; and (3) next steps and challenges in reducing AE. Illustrations.

Download or read book Reducing Climate Impacts in the Transportation Sector written by Daniel Sperling and published by Springer Science & Business Media. This book was released on 2008-12-15 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 250 experts from around the world gathered at the Asilomar Transportation and Energy Conference in August 2007 to tackle what many agree is the greatest environmental challenge the world faces: climate change. This 11th Biennial Conference, organized under the auspices of the Energy and Alternative Fuels Committees of the U.S. Transportation Research Board, examined key climate change policy issues and strategies to combat climate impacts from the transportation sector, a leading source of greenhouse gas emissions. This book includes chapters by leading presenters at the Asilomar Conference that reflect the most current views of the world’s experts about a critical and rapidly evolving energy and environmental problem. The chapters in this book examine increasing worldwide emissions of greenhouse gases, uncertain oil supply, evolving climate change science, public attitudes toward climate change, and the implications for the U.S. of growth in China, India and elsewhere. They propose methods to reduce growth in vehicle travel through alternative fuel, new technologies, and land use planning. They examine the costs and the potential for greenhouse gas reduction through deployment of advanced technology and alternative fuels and propose strategies to motivate consumers to buy fuel efficient and alternative fuel vehicles, including heavy duty trucks.

Download or read book Policy Options to Prevent Climate Change written by United States. Congress. House. Committee on Ways and Means and published by . This book was released on 2011 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Clean Fuels for Asia written by Michael Walsh and published by World Bank Publications. This book was released on 1997-01-01 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gasoline, alternative fuels.

Download or read book Departments of Transportation and Housing and Urban Development and Related Agencies Appropriations for 2016 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Transportation, Housing and Urban Development, and Related Agencies and published by . This book was released on 2015 with total page 1508 pages. Available in PDF, EPUB and Kindle. Book excerpt: