Public Health Effects of Long-Term Exposure to Mobile Source PM in California

PM₂.₅ mass concentration fields associated with on-road motor vehicles were created with 1-km spatial resolution for four heavily polluted urban areas in California: Los Angeles, San Francisco, Sacramento, and Fresno. Monthly-average concentration fields were created for the years 2000 through 2011. Concentration fields were predicted with a Chemical Transport Model (CTM) based on meteorology fields predicted by the Weather Research and Forecast (WRF) model and emissions fields predicted based on measured activity combined with emissions measurements and spatial surrogates. Statistical bias correction was applied to bring predicted PM₂.₅ concentrations into close agreement with measured values. Averaged across all years, motor vehicle tailpipe emissions generally accounted for less than 5% of the total PM₂.₅ concentrations. PM₂.₅ mass concentrations across the study regions decreased by 10-20% between the years 2000-2011, with similar declines predicted for motor vehicle tailpipe contributions to PM₂.₅. The BenMAP-CEv1.5 model created by the US Environmental Protection Agency (EPA) estimates that reductions in PM₂.₅ emitted from motor vehicles between 2000-2011 avoids 300 deaths each year with an equivalent monetary value estimated at $2.3B yr⁻¹. Future studies may use the air pollution exposure fields developed in the current project to analyze health disparities across different population segments or to search for epidemiological associations between pollutant concentrations and health effects.

• Record URL:
  https://cpb-us-w2.wpmucdn.com/sites.coecis.cornell.edu/dist/6/132/files/2016/04/UCD_YR4_KLEEMAN_FINAL_PUBLIC-HEALTH-EFFECTS.pdf
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/58273
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  University of California, Davis

  Department of Civil and Environmental Engineering, One Shields Avenue
  Davis, CA  United States  95616

  Center for Transportation, Environment, and Community Health

  Cornell University
  Ithaca, NY  United States  14853

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Authors:
  • Kleeman, M J
  • 0000-0002-0347-7512
• Publication Date: 2021-9-29

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Maps; References; Tables;
• Pagination: 28p

Subject/Index Terms

• TRT Terms: Exhaust gases; Particulates; Public health
• Geographic Terms: California
• Subject Areas: Environment; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 01787364
• Record Type: Publication
• Contract Numbers: 69A3551747119
• Files: UTC, NTL, TRIS, ATRI, USDOT
• Created Date: Nov 5 2021 5:18PM