The objectives of this research were: 1) to determine if the standard curve number is representative of rainfall-runoff processes for Texas watersheds; 2) if not, to develop a method to adjust the NRCS curve number for use on Texas watersheds; and 3) to compare the deviations generated from the project and observed data to a curve number adjustment
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This report documents a research project sponsored by the Alabama Department of Transportation (ALDOT) and conducted by the University of Central Florida (UCF) and the University of Alabama at Birmingham (UAB) to develop a user-friendly, Windows version of MOBILE6 and a Windows carbon monoxide (CO) screening model. Both models were developed for us
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The purpose of this project is to identify the strategies adopted by several states around the country for preparing to adjust their transportation planning practices to the regulatory requirements associated with designation as an air quality nonattainment area, namely transportation conformity.
This report assesses the potential of substitutes for gasoline to reduce emissions of carbon dioxide and other greenhouse gases (GHGs) by automobiles and light-duty trucks. It estimates reductions in future GHG emissions under specific assumptions about growth in light-duty vehicle travel and the replacement of gasoline by various other fuels, both
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This report will improve understanding of how states and localities might contribute to greenhouse gas (GHG) emissions reduction through transportation planning. Transportation is a major contributor to GHG emissions. State and local transportation planning affects transportation decisions, which, in turn, can influence travel patterns, land use, e
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The use of alternative fuels to power transit buses is steadily increasing. Several fuels, including Compressed Natural Gas (CNG), Liquefied Natural Gas (LNG), Liquefied Petroleum Gas (LPG), and Methanol/Ethanol, are already being used. At present, there are no available comprehensive facility guidelines to assist transit agencies contemplating con
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This report presents the major assumptions of the National Energy Modeling System (NEMS) used to generate the projections in the Annual Energy Outlook 20031 (AEO2003), including general features of the model structure, assumptions concerning energy markets, and the key input data and parameters that are most significant in formulating the model res
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The state of Wisconsin operates one of the nation's most effective inspection/maintenance (I/M) programs. In Wisconsin's I/M program, vehicles registered in the Milwaukee metropolitan area are subjected to a transient emission test using the IM240 test cycle or an on-board diagnostic (OBDII) check, if the vehicle is a 1996 or newer model. These tes
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Accessibility is a key ingredient of well-being and prosperity in contemporary societies. The ability of individuals, families, entrepreneurs and firms to exchange goods and services, to be where activities are being carried out, and to interact with people on a regular basis is crucial not only to economic life but also to the quality of life. Wit
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In addition to their significant environmental impacts, medium-duty and heavy-duty (HD) vehicles are high volume fuel users. Development of such vehicles, which include transit buses, refuse trucks, and HD Class 6-8 trucks, that are fueled with natural gas is strategic to market introduction of natural gas vehicles (NGV). Over the past five years t
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This paper summarizes the Next Generation Natural Gas Vehicle (NG-NGV) Program that is led by the U.S. Department Of Energy's (DOE's) Office of Heavy Vehicle Technologies (OHVT) through the National Renewable Energy Laboratory (NREL). The goal of this program is to develop and implement one Class 3-6 compressed natural gas (CNG) prototype vehicle a
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This report presents the major assumptions of the National Energy Modeling System (NEMS) used to generate the projections in the Annual Energy Outlook 20011 (AEO2001), including general features of the model structure, assumptions concerning energy markets, and the key input data and parameters that are most significant in formulating the model res
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This report provides information on recent efforts to use the Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) fuel-cycle model to estimate air toxics emissions. GREET, developed at Argonne National Laboratory, currently addresses greenhouse gas emissions and such regulated emissions as volatile organic compounds, nit
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Gas-to-liquids catalytic conversion technologies show promise for liberating stranded natural gas reserves and for achieving energy diversity worldwide. Some gas-to-liquids products are used as transportation fuels and as blendstocks for upgrading crude-derived fuels.
The U.S. has numerous goals for transportation in the following general areas: safety, mobility, economic growth and trade, human and natural environment, and national security. Logically a “best practice” policy would contribute to all of these goals, and would have well-accepted monetized costs and benefits that are compelling. However, because o
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Concerns about global warming are focusing increasingly on the contribution of human activities, including aviation. Jet aircraft are among many sources of greenhouse gases-gases that can trap heat, potentially increasing the temperature of the earth's surface and leading to changes in climate. According to a recent report by the National Research
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This paper presents the major assumptions of the National Energy Modeling System (NEMS) used to generate the projections in the Annual Energy Outlook 20001 (AEO2000), including general features of the model structure, assumptions concerning energy markets, and the key input data and parameters that are most significant in formulating the model resu
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The Federal Highway Administration (FHWA) is participating in an Organization for Economic Cooperation and Development (OECD) research effort to compile and evaluate greenhouse gas (GHG) abatement policies. One aspect of this research requires data on before and after studies of GHG reduction strategies implemented in the U.S. This paper summarizes
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The Clean Air Act Amendments (CAAA) of 1990 require far-reaching efforts under the "transportation conformity" regulations to assure that transportation investments in nonattainment and maintenance areas are consistent with state commitments to meet national air pollution standards. This research documents how these regulations were implemented dur
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Barwood Cab Fleet Study Summary is the second in a new series called 'Alternative Fuel Information Case Studies', designed to present real-world experiences with alternative fuels to fleet managers and other industry stakeholders.
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