Bureau of Transportation Statistics (BTS)
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Table 3 - Cross-Tabulation of BAR Smog Check Test Results with Registration Status

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Field status Number Passed # Passed % Failed # Failed % Gross polluter # Gross polluter % Tampered # Tampered % Aborted # Aborted % Unknown # Unknown %
Registered 51,974 50,423 97.0 682 1.3 250 0.48 25 0.1 391 0.8 203 0.4
Instantaneous 1,449 1,385 95.6 30 2.1 13 0.90 2 0.1 12 0.8 7 0.5
Long term 601 549 91.4 18 3.0 19 3.16 2 0.3 10 1.7 3 0.5
Chronic 13 11 84.6 1 7.7 1 7.69 0 0.0 0 0.0 0 0.0
Front 4,921 4,716 95.8 91 1.9 44 0.89 4 0.1 44 0.9 22 0.5
Unknown 7,387 7,015 95.0 157 2.1 66 0.89 13 0.2 83 1.1 53 0.7
Total 66,346 64,100   979   393   46   540   288  

Key: BAR = Bureau of Automotive Repair.