AIR POLLUTION AND ROADWAY LOCATION, DESIGN, AND OPERATION, PRELIMINARY STUDY OF DISTRIBUTION OF CARBON MONOXIDE ON AND ADJACENT TO FREEWAYS

The air quality measurements used to characterize the temporal and spatial distributions of carbon monoxide (CO) downwind from highway line sources are discussed. Three different highway geometrics were monitored within the Los Angeles area. They included two depressed sections, an at-grade section and a fill section. Measurements for this study, at any one site, consisted of (1) as many as 24 carbon monoxide sampling points for the integrated one hour CO concentrations, (2) one hour values of surface wind speeds and directions, and (3) one hour traffic counts. All CO measurements were made using bag sampling techniques. The data were analyzed to determine the vertical and horizontal dispersion rates, the effects of surface roughness on the dispersion of CO and CO spatial distribution during a period of relatively high concentrations. The data base collected for this study will provide information to verify and calibrate line source diffusion models.

• 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:
  • Ranzieri, A J
  • Bemis, G R
  • Shirley, E C
• Publication Date: 1976-9

Media Info

• Pagination: 214 p.

Subject/Index Terms

• TRT Terms: Air pollution; Carbon monoxide; Data collection; Highway design; Highways; Location; Traffic counting; Traffic distribution; Velocity; Wind
• Uncontrolled Terms: Highway location
• Old TRIS Terms: Dispersion; Wind velocity
• Subject Areas: Design; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00167127
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FHWA-RD-76-141 Intrm Rpt., CADOTTL-7080-2-75-15, FCP 33F3-032
• Contract Numbers: DOT-FH-11-7730
• Files: NTIS, TRIS, USDOT, STATEDOT
• Created Date: Sep 27 1978 12:00AM