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A Longitudinal Study of the Effects of Motor Vehicle Emission Standards on Commuter Exposure to Carbon Monoxide

This is a 30-year study of commuter exposure to motor vehicle exhaust emissions on an arterial highway (State Route 82 – El Camino Real) on the San Francisco Peninsula. Study results to date show the effectiveness of California’s motor vehicle emission control program. The study’s unique longitudinal design observed the cumulative effect of progressively tighter emission standards and the state’s inspection and maintenance program over the last three decades. The study’s methodology has potential for developing countries in Asia that have relatively new programs to control emissions from rapidly growing motor vehicle populations in mega-cities. The project received funding from the U.S. Environmental Protection Agency.

Prof. Peter Flachsbart

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