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Enhanced I/M Program Evaluation Report - June 2006 - June 2008

Executive Summary

Complete downloadable report PDF (1.03 mb, 66 pgs)

Biennial long-term program evaluations are required for enhanced I/M programs under 40 CFR Part 51.353(c)(1) of the federal Inspection/Maintenance (I/M) rule. Program evaluation provides a mechanism for I/M jurisdictions to evaluate the effectiveness of their programs, and if appropriate, to make enhancements to operating programs. The New York State Department of Environmental Conservation (DEC) has submitted four biennial program evaluations to the United States Environmental Protection Agency (EPA) in January 2001, November 2002, December 2004 and February 2007. This document retains a similar reporting format to these past submissions.

New York State has implemented two enhanced I/M programs, New York Transient Emissions Short Test (NYTEST) and New York Vehicle Inspection Program (NYVIP), to comply with federal I/M requirements. These programs effectively reduce the hydrocarbon, carbon monoxide, and nitrogen oxide emissions from applicable motor vehicles. This report details the overall progression of these enhanced I/M programs. The Department cites the following components that have led to the effectiveness of NYVIP and NYTEST programs:

  1. New York implemented mandatory statewide (62 counties) I/M inspection requirements. The 53-county "Upstate I/M Area" complies with the Ozone Transport Region (OTR) low enhanced I/M performance standard noted under §51.351(h). The 9-county New York Metropolitan Area (NYMA) complies with the high enhanced performance standard noted under §51.351(f);
  2. New York State requires motorists to perform mandatory I/M inspections on an annual basis and upon change of ownership;
  3. Since May 2005, mandatory on-board diagnostic (OBD II) inspections have been required statewide. New York's on-board diagnostics testing was developed in accordance with EPA's final OBD implementation guidance and 40 CFR Parts 51 and 86. New York outlined the components of the OBD II-based NYVIP program in its March 2006 State Implementation Plan revision;
  4. EPA approved the NYTEST transient test relative to the model transient I/M test, the "IM240." NYTEST received 95% of the available credit for hydrocarbon emissions, 99% of the available credit for carbon monoxide emissions, and 99% of the available credit for nitrogen oxide emissions.
  5. The NYTEST I/M program has operated at "final" cutpoints since April 1, 2003;
  6. New York State developed a comprehensive diagnostic and repair procedure to be utilized in conjunction with the NYTEST transient test to insure that failed vehicles receive effective, long term repairs;
  7. I/M program data confirms that vehicles failing an I/M inspection receive repairs that last more than two years;
  8. Through the combination of sticker-based and registration-based denial enforcement (RBE), New York's motorist compliance rate exceeds the minimum performance standard requirements for enhanced I/M programs. RBE was implemented in the 53-county Upstate I/M area in July 2007 (see Appendix A);
  9. Administrative, sticker compliance, and NYTEST equipment audits are completed to ensure that New York's I/M programs maximize emission reductions; and
  10. The New York City Taxi and Limousine Commission (TLC) operates an approved centralized, test-only OBD II inspection program. Applicable yellow medallion taxi cabs receive inspections three times a year at the City operated facility located in Queens, NY.

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  • Division of Air Resources
    Enhanced I/M Program
    625 Broadway
    Albany, NY 12233-3255
    518-402-8292
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