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I/M Network Type: Effects On Emission Reduction, Cost, And Convenience--Technical Information Document.

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The Clean Air Act Amendments (CAAA) of 1990 require that EPA revise and republish Inspection and Maintenance (I/M) guidance in the Federal Register addressing a variety of issues including network type, i.e., whether the program is centralized or decentralized.
Nearly every State that must operate an I/M program will need to obtain legislative authority to meet revised guidelines. This need provides an opportunity to reassess the effectiveness of current I/M program designs and make changes that will lead to improved air quality over the next decade. Network type is the most obvious and influential factor at work in an I/M program.
This report attempts to analyze how emission reduction effectiveness, cost, and convenience vary by network type. Results indicate that centralized I/M programs are more effective at reducing emissions at a lower cost than decentralized programs. Consumer convenience, however, is an important factor in network design and public acceptance.

Exhaust emissions; Inspection; Maintenance; Motor vehicles; Tests
Reference #:
EPA Office:
Office of Air and Radiation
Office Suboffice:
Office of Mobile Sources
Office Division:
No division specified
EPA Author:
Tierney, Eugene J.
Document Type:
Cost-Effectiveness Analysis
Document Status:
Not Reported

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