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Enhanced I/M Program Evaluation Report - June 2010 - June 2012

Executive Summary

Complete downloadable report PDF (695 KB, 46 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) submitted six biennial program evaluations to the United States Environmental Protection Agency (EPA), as dated January 2001, November 2002, October 2004, February 2007, March 2009, and October 2010. This document retains the reporting format used for the past submissions.

DEC and the New York State Department of Motor Vehicles (DMV) jointly administer New York's I/M programs. During the June 30, 2010 to June 30, 2012 evaluation period, New York State operated two enhanced I/M programs, the New York Transient Emissions Short Test (NYTEST) and the New York Vehicle Inspection Program (NYVIP). The NYTEST program formally ended on December 31, 2010, and the last calendar year (2010) of NYTEST emissions inspection data was evaluated as part of this report.

The NYTEST and NYVIP programs have effectively reduced hydrocarbon, carbon monoxide, and nitrogen oxide emissions from applicable motor vehicles through required emissions inspections and proper vehicle maintenance and repair. This report also details the overall progression of New York's enhanced I/M programs.

The following components that have contributed to the effectiveness of NYVIP and NYTEST programs:

  1. New York State requires mandatory, statewide (62 counties) emissions inspections on an annual frequency 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 the Code of Federal Regulations (CFR), Title 40, Chapter I, Subpart S, §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 emissions inspection 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 within its March 2006 and July 2009 State Implementation Plan (SIP) revisions;
  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. The NYTEST I/M program operated at "final" cutpoints from April 1, 2003 to its termination date.
  5. New York State developed a comprehensive diagnostic and repair procedure to insure that vehicles failing the NYTEST transient test received effective, long term repairs. I/M program data confirmed that vehicles failing the NYTEST I/M inspection received repairs that last more than two years;
  6. The Departments completed sticker compliance, NYTEST equipment, and program (enforcement) audits to ensure that New York's I/M programs maximize emission reductions; and
  7. Since December 2003, the New York City Taxi and Limousine Commission (TLC) has operated a centralized, test-only OBDII inspection facility in Queens (Woodside). Applicable yellow medallion taxi cabs and for-hire livery vehicles are required to receive safety/emissions inspections three times a year.

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