CALINE 4-A DISPERSION MODEL FOR PREDICTIONG AIR POLLUTANT CONCENTRATIONS NEAR ROADWAYS

A description of the California Line Source Dispersion Model, CALINE4, is given. The model uses traffic emissions, site geometry and meteorology to predict air pollutant concentrations near roadways. Predictions can be made for carbon monoxide, nitrogen dioxide and suspended particles. Options for modeling near intersections, parking lots, evaluated or depressed freeways, and within canyons are given. A modal emissions model developed for the CALINE4 intersections link option is described. Also, an adjustment for transient emissions is developed. Computer documentation and user instructions for CALINE4 are included in the report. Sensitivity of the model to various input parameters is illustrated in a series of the model response curves. The model is verified using data from five separate field studies. Two of the studies were conducted as part of this research and are described in detail. Data from one of these, a highway tracer gas release experiment, are presented in an appendix to the report. (Author)

• Corporate Authors:

  California Department of Transportation

  Transportation Laboratory
  5900 Folsom Boulevard
  Sacramento, CA  United States  95819

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Benson, P E
• Publication Date: 1984-11

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: v.p.

Subject/Index Terms

• TRT Terms: Air pollution; Canyons; Carbon monoxide; Concentration (Chemistry); Freeways; Intersections; Nitric oxide; Nitrogen oxides; Parking lots; Particulates; Sensitivity; Simulation; Validation
• Uncontrolled Terms: Concentration
• Old TRIS Terms: Dispersion
• Subject Areas: Highways; Operations and Traffic Management; Terminals and Facilities;

Filing Info

• Accession Number: 00395916
• Record Type: Publication
• Report/Paper Numbers: FHWA-CA-TL-84-15 Final Rpt
• Contract Numbers: E78TL06
• Files: TRIS, USDOT, STATEDOT
• Created Date: Oct 31 1985 12:00AM