The TRANSIMS Approach to Emission Estimation

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Description

Transportation systems play a significant role in urban air quality, energy consumption and carbon-dioxide emissions. Recently, it has been found that current systems for estimating emissions of pollutants from transportation devices lead to significant inaccuracies. Most of the existing emission modules use very aggregate representations of traveler behavior and attempt to estimate emissions on typical driving cycles. However, recent data suggests that typical driving cycles produce relatively low emissions with most emissions coming from off-cycle driving, cold-starts, malfunctioning vehicles, and evaporative emissions. TRANSIMS is a simulation system for the analysis of transportation options in metropolitan areas. It's major functional components ... continued below

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22 p.

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Barth, M.J.; Smith, L.; Thayer, G.R. & Williams, M.D. February 1, 1999.

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Description

Transportation systems play a significant role in urban air quality, energy consumption and carbon-dioxide emissions. Recently, it has been found that current systems for estimating emissions of pollutants from transportation devices lead to significant inaccuracies. Most of the existing emission modules use very aggregate representations of traveler behavior and attempt to estimate emissions on typical driving cycles. However, recent data suggests that typical driving cycles produce relatively low emissions with most emissions coming from off-cycle driving, cold-starts, malfunctioning vehicles, and evaporative emissions. TRANSIMS is a simulation system for the analysis of transportation options in metropolitan areas. It's major functional components are: (1) a population disaggregation module, (2) a travel planning module, (3) a regional microsimulation module, and (4) an environmental module. In addition to the major functional components, it includes a strong underpining of simulation science and an analyst's tool box. The purpose of the environmental module is to translate traveler behavior into consequent air quality. The environmental module uses information from the TRANSIMS planner and the microsimulation and it supports the analyst's toolbox. The TRANSIMS system holds the promise of a more complete description of the role of heterogeneity in transportation in emission estimation.

Physical Description

22 p.

Notes

OSTI as DE00007422

Medium: P; Size: 22 pages

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  • Air Waste Management 92nd Annual Meeting and Exhibition, St. Louis, MO (US), 06/20/1999--06/24/1999

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  • Report No.: LA-UR-98-518
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 7422
  • Archival Resource Key: ark:/67531/metadc701990

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Creation Date

  • February 1, 1999

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 10, 2017, 3:17 p.m.

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Barth, M.J.; Smith, L.; Thayer, G.R. & Williams, M.D. The TRANSIMS Approach to Emission Estimation, article, February 1, 1999; New Mexico. (digital.library.unt.edu/ark:/67531/metadc701990/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.