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Related Experiment Videos

Inspection/maintenance program evaluation: replicating the Denver Step Method for an Atlanta fleet.

Elizabeth A Corley1, Leisha Dehart-Davis, Jim Lindner

  • 1Air Quality Laboratory, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.

Environmental Science & Technology
|July 12, 2003
PubMed
Summary

The Atlanta Inspection/Maintenance (I/M) program significantly reduced fleet emissions, with carbon monoxide (CO) reductions of 11.5% in outer counties and 4.9% in inner counties, confirming the Step Method

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Area of Science:

  • Environmental Science
  • Atmospheric Chemistry
  • Public Policy

Background:

  • Vehicle emissions contribute to air pollution and public health concerns.
  • Inspection/Maintenance (I/M) programs are implemented to mitigate these emissions.
  • The Step Method provides a framework for evaluating the effectiveness of I/M programs.

Purpose of the Study:

  • To evaluate the emissions reduction achieved by the 1997 Atlanta Inspection/Maintenance (I/M) program.
  • To apply the Step Method of evaluation, as introduced by Stedman et al., to the Atlanta I/M program.
  • To compare the findings with previous evaluations, such as the 1995 Denver I/M program.

Main Methods:

  • Utilized the Step Method of Inspection/Maintenance (I/M) program evaluation.

Related Experiment Videos

  • Analyzed data separately for nine outlying Atlanta counties and four inner-city Atlanta counties.
  • Replicated the analytical approach used in the 1995 Denver I/M program evaluation.

    • Main Results:

    • The Atlanta I/M program demonstrated a notable change in fleet emissions.
    • Carbon monoxide (CO) weighted program benefits were estimated at 11.5% for the nine-county area.
    • CO weighted program benefits were estimated at 4.9% for the four-county area.

    Conclusions:

    • The 1997 Atlanta I/M program change resulted in observable fleet emissions reductions.
    • The Step Method analysis indicates significant environmental benefits from the Atlanta I/M program.
    • Findings are comparable to those from the Denver I/M program evaluation.