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Enhanced I/M Program Evaluation Report - June 2004 - June 2006

Complete downloadable report PDF (2.1 mb, 61 pgs)

Executive Summary

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, when necessary, to make enhancements or changes to improve operating programs. DEC submitted three previous biennial program evaluations to the United States Environmental Protection Agency (EPA)-Region 2 on January 23, 2001, November 13, 2002, and December 4, 2004. This document retains a similar reporting format as these past submissions.

New York State has implemented 2 enhanced I/M programs: New York Transient Emissions Short Test (NYTEST) and New York Vehicle Inspection Program (NYVIP). These programs are effective in reducing the contribution of hydrocarbon, carbon monoxide, and nitrogen oxide emissions from motor vehicles. This report reveals a record of accomplishments, as well the overall progression of the enhanced I/M programs. The following attributes have led to the effectiveness of these programs:

  1. New York implemented statewide (62 counties) motor vehicle emission inspections during the reporting period. The 53-county "Upstate I/M Area" complies with the Ozone Transport Region (OTR) low enhanced I/M performance standard, while the 9-county New York Metropolitan Area (NYMA) complies with the high enhanced performance standard;
  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 in all 62 New York State counties. New York's on-board diagnostic 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 substantiates that vehicles failing the I/M inspection are receiving repairs that last more than two years;
  8. Through the combination of sticker-based and registration-based denial enforcement, New York is achieving a I/M motorist compliance rate exceeding 96% in the New York Metropolitan Area; and
  9. Administrative and equipment audits ensure that New York's I/M programs maximize emission reductions.

During the reporting period, the New York City Taxi and Limousine Commission (TLC) implemented an approved OBD II inspection program. Applicable medallion taxi cabs now receive inspections three times a year at the TLC operated centralized test-only facility located in Queens, NY.