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Carrier Intervention Effectiveness Model
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The Carrier Intervention Effectiveness Model (CIEM) provides FMCSA with a tool for measuring the safety benefits of carrier interventions, measuring the direct impact of interventions on carriers that received them. The CIEM is based on data from the individual and cumulative "before and after" changes in the safety performance of carriers that received interventions in a given year. The model compares motor carriers’ crash rates in the 12 months following an intervention to their crash rates in the 12 months prior to the intervention. This change in crash rates is adjusted for the observed change in crash rates for carriers not receiving interventions. The CIEM incorporates data collected from compliance reviews (CRs) and other carrier interventions, including warning letters, offsite investigations, onsite focused investigations, and onsite comprehensive investigations. The CIEM yields national-level measurements that estimate the effectiveness of FMCSA’s carrier interventions. To learn more about the CIEM and the effectiveness of FMCSA carrier interventions, view the CIEM reports found here.
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| –>View Model Reports |
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Carrier Intervention Effectiveness Model - National Results
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| Total Interventions | 28,331 | 31,365 | 58,199 | 43,275 | 38,140 | 34,932 | 34,695 | 44,359 | 41,748 | 41,240 | | CSA Warning Letter | 2,184 | 5,790 | 39,004 | 23,835 | 20,225 | 20,535 | 20,443 | 30,530 | 26,982 | 26,970 | | Offsite Investigation | 345 | 687 | 639 | 618 | 619 | 381 | 169 | 127 | 91 | 238 | | Onsite Focused Investigation | 520 | 1,199 | 6,246 | 10,470 | 9,388 | 7,376 | 7,911 | 7,110 | 7,497 | 7,573 | | Onsite Comprehensive Investigation | 386 | 829 | 1,400 | 7,039 | 5,796 | 5,891 | 5,395 | 5,981 | 6,387 | 5,925 | | PRISM Warning Letter | 7,500 | 7,415 | 1,764 | - | - | - | - | - | - | - | | Compliance Review2 | 16,517 | 14,564 | 8,263 | - | - | - | - | - | - | - | | Non-ratable Review | 879 | 881 | 883 | 1,313 | 2,112 | 749 | 777 | 611 | 791 | 534 | | Estimated Benefits | | Crashes Prevented | 2,398 | 1,830 | 6,567 | 5,283 | 7,256 | 5,811 | 7,136 | 7,648 | 8,765 | 9,627 | | Injuries Prevented | 1,508 | 1,142 | 4,033 | 3,251R | 4,354 | 3,316 | 3,965 | 4,213 | 4,818 | 5,153 | | Lives Saved | 80 | 59 | 215 | 175R | 229 | 168 | 212 | 222 | 269 | 275 |
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R Revised per FY 2013 CIEM Summary Report.
1 These results have been updated to reflect refinements to the CIEM, and hence do not necessarily correspond with results published in archived reports.
2 Beginning in FY 2012, all reviews previously considered motor carrier safety compliance reviews are included in the CSA onsite comprehensive investigations total.
3 Beginning with FY 2016, these results reflect a model revision incoporating month-by-month comparison groups. |
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