This is the first in a series of reports documenting the Virginia Department of Highways & Transportation line source model for predicting carbon monoxide concentrations within the microscale environments of highways. The purpose of this first report is to provide a detailed introduction to and verification of the theoretical development of AIRPOL-4, a true Gaussian formulation enhanced by several theoretical and computational innovations. These innovations establish AIRPOL-4 as a major advancement in the field of air quality modeling. Specifically, the mathematical development of the conceptual aspect of the model demonstrates AIRPOL-4's ability to correctly analyze: 1) receptors upwind of a roadway; 2) all wind speeds equal to or greater than 0; 3) any samping interval; 4) urban environments; 5) all traffic speeds greater than or equal to 0; and 6) at grade, cut, and fill geometries. Furthermore, the algorithmic development of the model firmly establishes AIRPOL-4's position as a very efficient and very accurate model. The second report in this series provides the definitive experimental evidence of AIRPOL-4's predicitive performance and cost effectiveness.

  • Record URL:
  • Corporate Authors:

    Virginia Highway and Transportation Research Council

    Charlottesville, VA  United States 
  • Authors:
    • Carpenter, W A
    • Clemena, G G
  • Publication Date: 1975-5

Media Info

  • Features: Figures; References;
  • Pagination: 58 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00099302
  • Record Type: Publication
  • Report/Paper Numbers: VHTRC 75-R49
  • Created Date: Oct 18 1975 12:00AM