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Enhanced I/M Program Evaluation Report - June 2008 - June 2010

Executive Summary

Complete downloadable report PDF (583 KB, 57 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 five biennial program evaluations to the United States Environmental Protection Agency (EPA) as dated January 2001, November 2002, October 2004, February 2007, and March 2009. This document retains a reporting format similar 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 hydrocarbon, carbon monoxide, and nitrogen oxide emissions from applicable motor vehicles. This report details the overall progression of the enhanced I/M programs.

The Department cites the following components that have led to the effectiveness of NYVIP and NYTEST programs:

  1. New York has implemented mandatory statewide (62 counties) emissions inspection requirements. New York State requires motorists to perform mandatory I/M inspections on an annual basis and upon change of ownership. The 53-county "Upstate I/M Area" complies with the Ozone Transport Region (OTR) low enhanced I/M performance standard defined under §51.351(h). The 9-county New York Metropolitan Area (NYMA) complies with the high enhanced performance standard defined under §51.351(f);
  2. 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;
  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 a March 2006 State Implementation Plan revision;
  4. EPA approved the NYTEST transient test relative to the model transient I/M test ("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 oxides of nitrogen (NOx) 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 insure that vehicles failing the NYTEST transient test receive effective, long term repairs;
  7. I/M program data confirms that vehicles failing the NYTEST I/M inspection receive repairs that last more than two years;
  8. Administrative, sticker compliance, and NYTEST equipment audits are completed to ensure that New York's I/M programs maximize emission reductions; and
  9. The New York City Taxi and Limousine Commission (TLC) operates a 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. The TLC recently has required mandatory OBDII inspections of applicable for-hire-vehicles at this facility.

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