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Program Effectiveness
The Program Effectiveness Models measure effectiveness of FMCSA’s enforcement programs in reducing crashes, injuries, and fatalities involving commercial motor vehicles on our roadways.
Carrier Intervention Effectiveness Model
Measures the safety benefits of carrier interventions, assessing the direct impact of interventions on carriers that received them.
Roadside Intervention Effectiveness Model
Measures the effectiveness of roadside inspections and traffic enforcements.
Carrier Intervention Effectiveness Model
FMCSA uses the Carrier Intervention Effectiveness Model (CIEM) to measure the safety benefits of motor carrier interventions and the direct impact they have on carriers. The model compares two factors: 1) The carriers’ crash rates in the 12 months following an intervention, and 2) The carriers’ crash rates in the 12 months prior to the intervention. The change in crash rates is adjusted for the observed change in crash rates for carriers not receiving interventions.
CIEM Reports
To learn more about the CIEM and effectiveness of FMCSA carrier interventions, view the CIEM reports.| Carrier Intervention Effectiveness Model National Results | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FY 2009 | FY 20101 | FY 20111 | FY 2012 | FY 2013 | FY 2014 | FY 2015 | FY 20163 | FY 20173 | FY 20183 | FY 2019 | FY 2020 | FY 2021 | ||
| 1 | Total Interventions | 28,331 | 31,365 | 58,199 | 43,275 | 38,140 | 34,932 | 34,695 | 44,359 | 41,748 | 41,240 | 38,678 | 34,281 | 37,786 |
| 2 | CSA Warning Letter | 2,184 | 5,790 | 39,004 | 23,835 | 20,225 | 20,535 | 20,443 | 30,530 | 26,982 | 26,970 | 25,652 | 22,250 | 25,919 |
| 3 | Offsite Investigation | 345 | 687 | 639 | 618 | 619 | 381 | 169 | 127 | 91 | 238 | 1,013 | 5,058 | 4,821 |
| 4 | Onsite Focused Investigation | 520 | 1,199 | 6,246 | 10,470 | 9,388 | 7,376 | 7,911 | 7,110 | 7,497 | 7,573 | 6,177 | 3,938 | 4,905 |
| 5 | Onsite Comprehensive Investigation | 386 | 829 | 1,400 | 7,039 | 5,796 | 5,891 | 5,395 | 5,981 | 6,387 | 5,925 | 5,494 | 2,908 | 2,064 |
| 6 | PRISM Warning Letter | 7,500 | 7,415 | 1,764 | - | - | - | - | - | - | - | - | - | - |
| 7 | Compliance Review2 | 16,517 | 14,564 | 8,263 | - | - | - | - | - | - | - | - | - | - |
| 8 | Non-ratable Review | 879 | 881 | 883 | 1,313 | 2,112 | 749 | 777 | 611 | 791 | 534 | 342 | 127 | 77 |
| 9 | Estimated Benefits | |||||||||||||
| 10 | Crashes Prevented | 2,398 | 1,830 | 6,567 | 5,283 | 7,256 | 5,811 | 7,136 | 7,648 | 8,765 | 9,627 | 8,379 | 6,819 | 11,305 |
| 11 | Injuries Prevented | 1,508 | 1,142 | 4,033 | 3,251R | 4,354 | 3,316 | 3,965 | 4,213 | 4,818 | 5,153 | 4,519 | 3,461 | 5,599 |
| 12 | Lives Saved | 80 | 59 | 215 | 175R | 229 | 168 | 212 | 222 | 269 | 275 | 246 | 217 | 370 |
RRevised per FY 2013 CIEM Summary Report.
1These results have been updated to reflect refinements to the CIEM, and hence may not necessarily match results published in archived reports.
2Beginning in FY 2012, all reviews previously classified as motor carrier safety compliance reviews are included in the CSA onsite comprehensive investigations total.
3Beginning with FY 2016, these results reflect a model revision incoporating comparison group crash history time frames that are consistent with crash history time frames used for the carriers receiving interventions.
1These results have been updated to reflect refinements to the CIEM, and hence may not necessarily match results published in archived reports.
2Beginning in FY 2012, all reviews previously classified as motor carrier safety compliance reviews are included in the CSA onsite comprehensive investigations total.
3Beginning with FY 2016, these results reflect a model revision incoporating comparison group crash history time frames that are consistent with crash history time frames used for the carriers receiving interventions.