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  United States  95819

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  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

• TRT Terms: Air pollution; Chemical analysis; Chemical concentration; Deicing chemicals; Deicing equipment; Field tests; Highways; Inorganic salts; Loss and damage; Monitoring; Ozone; Plants; Recommendations; Soil chemistry; Standards; Vegetation
• Uncontrolled Terms: Damage assessment; Deicers
• Geographic Terms: California; Lake Tahoe Basin
• Old TRIS Terms: Soil analysis
• Subject Areas: Design; Environment; Highways; Research; Vehicles and Equipment;

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