A 2-day workshop is discussed, the principal objective of which was to provide the latest information on non-reactive models and methodology for carrying out air quality impact assessments at both the microscale and mesoscale levels. Gaussian line source models, their modifications and validations were discussed, as well as the theoretical basis of the microscale numerical (conservation of mass) models. The results were also discussed of the statistical comparison of 13 models using synthetic data samples. A new methodology was described for estimating concentrations of carbon monoxide near signalized intersections. This procedure takes into account the differences in emissions resulting from motor vehicles in various modes on a street or highway. Models that have been used for urban regional analysis were reviewed including the APRAC-1A urban diffusion model and the SAPOLLUT, a regional emissions model used in Virginia EPA's program for measuring motor vehicle emissions is described. Practical advice (based on practical experience) related to setting up a monitoring program is presented. Issues addressed during the 2-day workshop are listed.

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  • Supplemental Notes:
    • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. Presented at the Conference on the State of the Art of Assessing Transportation-Related Air Quality Impacts, Washington, D.C. October 22-24, 1975.
  • Corporate Authors:

    Transportation Research Board (TRB)

    Washington, DC   
  • Authors:
    • Chaves, Jesse R
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  • Publication Date: 1976

Media Info

  • Media Type: Digital/other
  • Pagination: pp 95-96
  • Monograph Title: Assessing transportation-related air quality impacts
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Filing Info

  • Accession Number: 00139654
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 16 1976 12:00AM