Arthur Winer

About Arthur Winer (Edit profile)

Distinguished Professor Emeritus of Environmental Health Sciences in the Fielding School of Public Health at the University of California, Los Angeles (

Carmageddon or Carmaheaven? Air Quality Results of a Freeway Closure

Arthur Winer, Yifang Zhu, and Suzanne Paulson

Air quality researchers have recently shifted their focus from regional smog, which has been reduced dramatically over the past 40 years, to the more localized impacts of vehicle emissions near roadways. Numerous studies have linked traffic-related air pollution to a broad range of adverse health outcomes. Concern has focused on black carbon, particles less than 2.5 microns in diameter (PM2.5), and ultrafine particles less than 100 nanometers in diameter, small enough to penetrate cell walls and cross the blood-brain barrier. These pollutants may be carried up to 300 meters downwind of major roadways during the day, and more than 2,000 meters downwind in the early morning hours, affecting large populations in major urban centers. By addressing these pollutants, policies to reduce traffic, congestion, and emissions can improve air quality and health. Download the PDF.

2018-02-12T21:32:32+00:00Categories: ACCESS 44, Spring 2014|Tags: , |

Down to the Meter: Localized Vehicle Pollution

Douglas Houston, Jun Wu, Paul Ong, and Arthur Winer

Air pollution control programs have helped improve many aspects of regional air quality over the past thirty years despite tremendous growth in both population and vehicle-miles traveled. However, regional strategies to confront vehicle-related pollution are proving to be insufficient to protect the health of those who live, work, attend school, or play near major roadways. Recent air pollution and epidemiological findings suggest that harmful vehicle-related pollutants and their associated adverse health effects concentrate within a couple hundred meters of heavily traveled freeways and thoroughfares. We’re just beginning to understand the health and economic costs of such localized effects, and we still know little about who is exposed to these pollutants.

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