Repair Avoidance and Evaluating Inspection and Maintenance Programs

Publication Date

4-11-1998

Document Type

Article

Organizational Units

College of Natural Science and Mathematics, Chemistry and Biochemistry

Keywords

Atmospheric chemistry, Emissions, Pollutants, Inspection and Maintenance

Abstract

On-road remote sensing measurements of vehicle carbon monoxide (CO) emissions in Denver, CO, have discovered vehicles that, after failing a state inspection and maintenance (I/M) test, are avoiding repair through sales to individuals who register them outside the program but still drive the vehicles in the I/M area. This reduces the emissions benefits from the program and makes it difficult to analyze program benefits by comparing the emissions of eligible vehicles with ineligible vehicles since the program is increasing the emissions of the ineligible vehicles. On-road emissions measurements of CO collected in 1995/1996 after the first year of Colorado's new centralized biennial I/M program showed a pattern of high emitting vehicles, which were unable to pass the new test, being moved out of the program but not out of the area. We predicted that if this were the case the observed pattern would disappear for CO data collected 1 year later. New measurements made in 1996/1997 confirmed this prediction.

Copyright Statement / License for Reuse

All Rights Reserved
All Rights Reserved.

Copyright Date

4-11-1998

Rights Holder

American Chemical Society

Provenance

Received from author

Language

English (eng)

Extent

2 pgs

Publication Statement

Copyright is held by the American Chemical Society. User is responsible for all copyright compliance.

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