This project assesses the safety performance of commercial motor vehicles (CMVs) in the state of Illinois. The motivation for this study was to assess if federal and state safety regulations, which until recently were different, led to differing outcomes in safety performance. The basic premise employed in this study is that differences in impacts between the regulations should be measurable by means of a set of outcome measures. The study used numerous state and national data on motor carrier safety and vehicle crashes. Between 1993 and 1997, both the CMV Fatality Rate and the CMV Fatal Crash Involvement Rate in Illinois dropped, mirroring national safety trends. The Illinois CMV Crash Involvement Rate (for all crashes) is somewhere between the light and heavy truck crash rates at the national level. Inspection rates (per million miles driven) are higher for interstate CMVs compared to intrastate CMVs. Drivers of interstate vehicles registered in states other than Illinois incurred the greatest Drive Out-Of-Service (OOS) rates. The highest rate of vehicle OOS is by intrastate vehicles registered in Illinois. Further, vehicles that were subject to more stringent inspection standards are less likely to be involved in crashes subsequently than those subjected to less stringent standards. A much greater percent of vehicles incurring more than a certain "threshold" number of inspection violations (12 or more) are likely to be involved in crashes. The percent of interstate CMVs incurring zero violations in Illinois that are subsequently involved in crashes (in Illinois and other states) is different from the percent of intrastate CMVs with zero violations. The median probability of being involved in a crash following an inspection is only slightly different for vehicles inspected in Illinois that belong to all four types of carriers, namely Illinois interstate carriers, Illinois intrastate carriers, non-Illinois interstate carriers and non-Illinois intrastate carriers.

  • Record URL:
  • Corporate Authors:

    University of Illinois, Chicago

    Urban Transportation Center, 412 South Peoria Street, Suite 340
    Chicago, IL  United States  60607

    Northwestern University, Evanston

    McCormick School of Engineering
    Evanston, IL  United States  60208-3109

    Illinois Transportation Research Center

    200 University Park Drive
    Edwardsville, IL  United States  62026-1806
  • Authors:
    • Thakuriah, Piyushimita
    • Ziliaskopolous, A
    • Yanos, G
    • Virmani, D
    • Screenivasan, A
    • Rivas, V
  • Publication Date: 2000-8


  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 130 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00800183
  • Record Type: Publication
  • Report/Paper Numbers: ITRC FR 98-1,, Final Report
  • Contract Numbers: VB-H1, FY98
  • Files: NTL, TRIS
  • Created Date: Oct 12 2000 12:00AM