Evaluating the Potential Safety Benefits of Electronic Hours-of-service Recorders Final Report

dc.contributorVirginia Tech Transportation Instituteen
dc.contributor.authorHickman, Jeffrey S.en
dc.contributor.authorCamden, Matthew C.en
dc.contributor.authorGuo, Fengen
dc.contributor.authorDunn, Naomi J.en
dc.contributor.authorHanowski, Richard J.en
dc.description.abstractThe purpose of the current study was to assess the benefits of installed electronic hours-of-service recorders (EHSRs) on safety and hours-of-service (HOS) violations related to Class 7 and 8 trucks as they operated during normal revenue service. Data were obtained through a third-party vendor that compiled previously-generated compliance data regarding participating motor carriers. Although the final data sets included data from 11 carriers representing small, medium, and large carriers (including a total of 82,943 crashes, 970 HOS violations, and 224,034 truck-years that drove a total of 15.6 billion miles), the data set in the current study was skewed toward larger, for-hire carriers and may not represent the overall U.S. trucking population. After controlling for calendar year, carriers in the data set, onboard safety system (OBSS) status, and long-haul/regional indicator, EHSR-equipped trucks had a significantly lower total crash rate (11.7 percent reduction) and a significantly lower preventable crash rate (5.1 percent reduction) than trucks not equipped with an EHSR. Small sample sizes limited the power to detect a significant difference between the EHSR cohort and the non-EHSR cohort for U.S. Department of Transportation (USDOT)-recordable and fatigue-related crashes. This result is primarily attributed to the lack of sufficient data (in terms of the number of these types of crashes) to be able to detect safety benefits with statistical significance at the observed level. After controlling for year, carrier index, OBSS status, and long-haul/regional indicator, EHSR-equipped trucks had a 53 percent lower driving-related HOS violation rate and a 49 percent lower non-driving-related HOS violation rate than trucks not equipped with EHSRs. The results show a clear safety benefit, in terms of crash and HOS violation reductions, for trucks equipped with EHSRs.en
dc.description.sponsorshipUnited States. Federal Motor Carrier Safety Administrationen
dc.format.extent82 pagesen
dc.identifier.citationHickman, J. S., Camden, M. C., Guo, F., Dunn, N. J., & Hanowski, R. J. (2014). Evaluating the potential safety benefits of electronic hours-of-service recorders final report. (FHWA-HRT-04-144). Washington, DC: United States. Federal Motor Carrier Safety Administration. Office of Analysis, Research, and Technology. Retrieved from http://ntl.bts.gov/lib/51000/51800/51846/13-059-Evaluating_the_Potential_Safety_Benefits_of_Electronic_HOS--Full_Report.pdf.en
dc.publisherUnited States. Federal Motor Carrier Safety Administration. Office of Analysis, Research, and Technologyen
dc.rightsIn Copyrighten
dc.subjectMotor carriersen
dc.subjectCommercial motor vehiclesen
dc.subjectHours of laboren
dc.subjectData recordersen
dc.subjectElectronic equipmenten
dc.subjectTraffic violationsen
dc.subjectFor-hire carriersen
dc.subjectCommercial driversen
dc.subjectFatigue (physiological condition)en
dc.subjectData loggingen
dc.subjectHighway safetyen
dc.titleEvaluating the Potential Safety Benefits of Electronic Hours-of-service Recorders Final Reporten
dc.typeGovernment documenten
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