HIGHWAY OPERATION AND PLANT DAMAGE

A five-year study was undertaken by Caltrans in 1973 to study the effects of deicing salts on terrestrial vegetation and explore other possible causes of plant damage both natural and manmade, and to recommend alternative courses of action. The study is essentially divided into two phases: (1) soil chemistry and salt analysis, and (2) vegetation damage assessment and recommendations for mitigation. The Environmental Branch of the Transportation Laboratory is performing phase 1 and the University of California at Davis has contracted to perform that portion of the research dealing with vegetation (phase 2). Ozone concentration data monitored from August 1974 through July 1975 indicated the levels are below the U.S. Environmental Protection Agency air quality standard of .08 PPM (hourly average).

  • Supplemental Notes:
    • See also PB-266 459.
  • Corporate Authors:

    California Department of Transportation

    Transportation Laboratory
    5900 Folsom Boulevard
    Sacramento, CA  USA  95819

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Nakao, D I
    • Hatano, M M
    • Howell, R B
    • Shirley, E C
  • Publication Date: 1976-1

Media Info

  • Pagination: 73 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00154860
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA/CA-76/56-Vol-1 Intrm Rpt., CADOTTL-7134-1-76-13
  • Files: NTIS, TRIS, USDOT, STATEDOT
  • Created Date: Jun 22 1977 12:00AM