Inuse emissions testing in Mexico

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In-use emissions testing in Mexico
John Rogers
jrogers_at_trafalgar-mexico.com
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Mexico Citys History
1982 Voluntary Inspection program
1988 Obligatory annual emissions inspection
for 1982 and earlier vehicles
1992 Obligatory Test for all vehicles 1993 Mul
ti-lane Macro-centers are opened. Dynamometer
test introduced for intensive-usage
vehicles. 1996 Test Repair centers closed.
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Test Repair

• Very convenient for vehicle owners
• But
• 50 percent of vehicles obtained their approval
  certificate fraudulently.
• Public Opinion gt a highly faulted emissions
  control program

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Lessons Learnt

• Must be seen by Public to be
• effective,
• totally objective,
• transparent and
• control gross polluters
• Focus on dirtiest vehicles
• Use Good Test Procedure
• Enforced, supervised and audited
• False Passes damage public acceptance

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Gasoline Gas Protocols

• Test-only allows good technical and
  administrative controls
• Dynamometers essential
• Easy to cause False Pass on Static Tests
• Only way to test for NOx
• Short loaded-mode, constant-speed test (ASM) easy
  to operate and accessible in investment and cost
• Additional controls needed

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Verificentro
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Improved user friendliness
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Social memory is long

• Has anyone ever asked you for money for your
  vehicle to pass the test?
• Survey Reforma 8 Nov 2003

Indicator of Program effectiveness is the cost of
false-pass
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Recent Changes

• Digital Video via Internet
• Near real-time data transmission
• Computer-based remote auditing
• Strengthened legal framework and sanctions
• More rigorous center audits
• Better control on instrument calibration

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Recommended lines of action

• Regarding Testing
• Dynamometer-based diesel test procedure
• Dynamometer tests for AWD and ATC vehicles
• Consider adding Motorcycles
• Wait on OBDII inspections
• Regarding Administration
• Strengthen real-time remote auditing
• Real-time data on Internet for transparency
• Stronger QA/QC
• Frequent evaluations of program effectiveness
• Unified government owned software required

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Thank you
John Rogers



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jrogers_at_trafalgar-mexico.com