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US I/M Programs

US I/M Programs. REDUCING THE IMPACT OF VEHICLES ON AIR AND ENVIRONMENT QUALITY IN CITIES Hotel Royal Pedregal, Mexico City January 22 – 23rd 2004 Robert Slott, MIT . Data Source. Literature and Best Practices Scan: Vehicle Inspection and Maintenance (I/M) Programs

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US I/M Programs

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  1. US I/M Programs REDUCING THE IMPACT OF VEHICLES ON AIR AND ENVIRONMENT QUALITY IN CITIES Hotel Royal Pedregal, Mexico City January 22 – 23rd 2004 Robert Slott, MIT

  2. Data Source Literature and Best Practices Scan: Vehicle Inspection and Maintenance (I/M) Programs Project Number 0092-02-09 Submitted to the Wisconsin Department of Transportation Bureau of Vehicle Services Bureau of Environment Prepared by: Rob Klausmeier June 2002

  3. US I/M Programs June 2002 31 States 8 Statewide Programs 15 Test & Repair 12 Test Only 4 Combined

  4. US I/M Programs June 2002 16 Tested for NOx 7 Included Diesels 10 Used IM240 • Used ASM All Planned to include OBDII

  5. I/M Research in States • Low income repair assistance (CA) • Finding Liquid Leakers (AZ, CA) - OBDII effectiveness (Many) • Remote sensing • Clean Screening (MO, CO) • High Emitter Identification (Many) • Reducing diesel emissions (CA)

  6. OBDII/OBDIII • OBDII • Only for vehicles equipped with OBDII • Need for Motorist Education • Readiness Codes and Inspection • Potential for Cheating - Clean Scanning • OBDIII • Will include VIN and Security Number • Time since Codes were Cleared

  7. Diesel Testing, PM • Two Standard Tests for Smoke • SAE 1667 • Snap Idle (HDDV) • Cheap, easy to cheat and thus needs very good QC/QA • Results do not correlate with on-road PM • R&D: A number of organizations looking at remote sensing for on-road PM.

  8. Diesel Testing, NOx • No State Testing for NOx • Dynamometers expensive • 7 states do diesel dyno smoke test • Remote Sensing • NOx Measurement Demonstrated • Not offered commercially because of problem of tailpipe location.

  9. Recommendations • Look for Liquid Leakers – If a program can be developed, large benefits expected. • Wait to see what happens with: • Diesel testing; currently unreliable & expensive. • Remote sensing for High Emitter Identification; high false pass, false fail. • Follow OBDII - inspections may be done in alternative low cost, convenient ways.

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