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Author : Thomas A. Williams
Publisher : Unknown
Page : 0 pages
File Size : 44,6 Mb
Release : 2016
Category : Intelligent transportation systems
ISBN : OCLC:967491802
Author : Trevor Klatko,Bismark Agbelie,Samuel Labi,Jon Fricker,Kumares Sinha
Publisher : Unknown
Page : 128 pages
File Size : 50,5 Mb
Release : 2016-12-31
Category : Electronic
ISBN : 1622604199
Vehicle Miles Traveled (VMT) is a critical measure of highway system performance used extensively in highway transportation management not only for reporting to oversight agencies such as the FHWA but also as an input for financial analysis, resource allocation, and impact assessments. In the current era as highway revenue from fuel taxes continues to fall and direct user charging such as VMT fees become increasingly attractive, consistent and reliable VMT estimates have become critical for evaluating highway funding options. In the current practice at most highway agencies including the Indiana DOT, there exists several alternative methods for VMT estimation that typically yield a spectrum of estimates that are inconsistent and for certain methods, even inaccurate. This study was commissioned by the Indiana Department of Transportation (INDOT) to develop a benchmark method for VMT estimation and to provide calibration factors for adjusting the VMT estimates derived from the other VMT estimation methods. The benchmark method used in this study was a segment-level framework that decomposes the entire road inventory into links and for each link, determining the product of the traffic volume and the inventory length. For the state highway system, the entire population was used; a comprehensive database was developed which facilitates extensive aggregations of VMT by geographical scope, route, functional class, and vehicle class. For the local roads, a sample of counties of different spatial locations and degrees of urbanization were used, and cluster analysis, geographic information systems (GIS), and spatial interpolation techniques were used to expand the VMT estimates from the local road samples to the population of all counties in the state. The results of this study indicate that there is significant variation, with respect to the benchmark method, of the VMT estimates of the other estimation methods. An implementation platform was developed in this study to produce outcomes that address the VMT data needs of the intended end users and stakeholders; this can be expanded to include new roads in future. It was determined that the current statewide VMT (2013) is 78 billion vehicle-miles, which is expected to grow to 95 billion vehicle miles in 2035.
Author : Brian L. Smith
Publisher : Unknown
Page : 38 pages
File Size : 42,7 Mb
Release : 2006
Category : Air quality management
ISBN : UCBK:C101160354
Air quality has been an issue of growing importance to the transportation sector since the enactment of the Clean Air Act Amendments of 1990 and the Transportation Equity Act for the 21st Century in 1998. According to these acts, states and local governments are required to attain and maintain National Ambient Air Quality Standards. The MOBILE model is the mobile emission factor model used in estimating air pollutants generated by mobile sources. In order to obtain accurate emission estimates, MOBILE must be provided with sound input data that accurately reflect local conditions. Among many input factors, vehicle miles traveled (VMT) fractions - the percentage of VMT for each vehicle type by roadway functional class - play a critical role. In this study a new methodology for estimating locally specific VMT fractions as an input to the MOBILE model was developed. Based on this methodology, VMT fractions were computed for the six non-attainment areas in Virginia: Frederick County, Fredericksburg, Hampton Roads, Northern Virginia, Richmond, and Roanoke. These estimates were compared with fractions estimated using existing methodologies. The comparison revealed significant differences. These differences, coupled with the fact that the proposed methodology uses significantly more local data and requires fewer assumptions than existing methods, illustrate the need for the Virginia Department of Transportation (VDOT) to reconsider its approach to applying the MOBILE model. Based on the results of this research effort, it is recommended that VDOT's Environmental Division use the proposed VMT fraction estimation methodology to generate input to the MOBILE model for mobile source emission estimates. This methodology will benefit VDOT by estimating mobile source emissions that better reflect local conditions. The cost of implementing the recommendation is minimal. Estimation of VMT fractions is a current activity, and the new methodology requires equivalent or less effort to the existing approach. In addition, required data for the proposed methodology can be obtained at no additional cost.
Author : S. C. M. Geertman,Christopher Pettit,Robert Goodspeed,Aija Staffans
Publisher : Springer Nature
Page : 632 pages
File Size : 43,9 Mb
Release : 2021-07-15
Category : Computers
ISBN : 9783030760595
This book forms a selection of chapters submitted for the CUPUM (Computational Urban Planning and Urban Management) conference, held in the second week of June 2021 at Aalto University in Helsinki, Finland. Chapters were selected from a double-blind review process by the conference's scientific committee. The chapters in the book cover developments and applications with big data and urban analytics, collaborative urban planning, applications of geodesign and innovations, and planning support science.
Author : David Lloyd Greene
Publisher : Unknown
Page : 96 pages
File Size : 44,6 Mb
Release : 1979
Category : Transportation
ISBN : NWU:35556021037999
Author : Jon D. Fricker,Raymond K.D. Kumapley
Publisher : Unknown
Page : 170 pages
File Size : 49,7 Mb
Release : 2002
Category : Traffic surveys
ISBN : UOM:39015075241706
Author : United States. Office of Highway Planning. Program Management Division
Publisher : Unknown
Page : 194 pages
File Size : 40,6 Mb
Release : 1973
Category : Traffic estimation
ISBN : UCSD:31822028994580
Author : Jonathan Dickinson
Publisher : DIANE Publishing
Page : 68 pages
File Size : 42,6 Mb
Release : 2007-09
Category : Science
ISBN : 1422315924
This report is a comprehensive greenhouse gas inventory for both New York City as a whole & for City gov¿t. operations. While there is no substitute for fed. action, all levels of gov¿t. have a role to play in confronting climate change & its potential impacts, & this report will help N.Y. begin doing that more aggressively. Mayor Bloomberg created the Mayor¿s Office of Long-term Planning & Sustainability & charged it with developing a comprehensive sustainability plan for the City¿s future. The result is PlaNYC, which has set a goal of reducing missions by 30% below 2005 levels by 2030, an ambitious but achievable goal. This greenhouse gas inventory is a critical first step in reducing N.Y.¿s contribution to global carbon dioxide levels. Illustrations.
Author : Anonim
Publisher : Unknown
Page : 78 pages
File Size : 48,7 Mb
Release : 1988
Category : Electronic
ISBN : UOM:39015075370422
Author : Anonim
Publisher : Unknown
Page : 76 pages
File Size : 46,8 Mb
Release : 1988
Category : Highway research
ISBN : UCAL:$C57190
Author : National Research Council,Transportation Research Board,Division on Earth and Life Studies,Board on Atmospheric Sciences and Climate,Board on Environmental Studies and Toxicology,Committee on Carbon Monoxide Episodes in Meteorological and Topographical Problem Areas
Publisher : National Academies Press
Page : 218 pages
File Size : 55,8 Mb
Release : 2003-08-01
Category : Science
ISBN : 0309089239
The regulation of carbon monoxide has been one of the great success stories in air pollution control. While more than 90 percent of the locations with carbon monoxide monitors were in violation in 1971, today the number of monitors showing violations has fallen to only a few, on a small number of days and mainly in areas with unique meteorological and topographical conditions.
Author : Anonim
Publisher : Unknown
Page : 138 pages
File Size : 42,7 Mb
Release : 1996
Category : Traffic assignment
ISBN : NWU:35556025466772
The most common method for producing regional or metropolitan area travel forecasts in the United States is to apply the following four modeling steps sequentially: trip generation; trip distribution; mode choice; and, route assignment. This traditional 4-step process passes output from one step to the next as input. While the process has produced forecast results sufficiently accurate for many types of long range transportation planning, it is commonly found that some of the outputs of the process are not consistent with inputs to earlier steps. The research undertaken in this project focused on methods to ensure that link speeds used in each step of the travel forecasting process are consistent with the final speeds estimated in the final step of the process. As a product of this research, a final report was prepared to provide guidance in the application of feedback.
Author : Anonim
Publisher : Unknown
Page : 396 pages
File Size : 51,9 Mb
Release : 1981
Category : Electronic
ISBN : UOM:39015075566151
Author : United States. Environmental Protection Agency. Office of Air Quality Planning and Standards
Publisher : Unknown
Page : 356 pages
File Size : 54,7 Mb
Release : 1974
Category : Air
ISBN : IND:30000092083629
Author : United States. Environmental Protection Agency. Office of Air Quality Planning and Standards
Publisher : Unknown
Page : 204 pages
File Size : 42,5 Mb
Release : 1974
Category : Air
ISBN : IND:30000092083637