United States Department of Transportation
i
Evaluating the Potential Safety Benefits of Electronic Hours-of-Service Recorders [Research Brief]
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2014-04-01
[PDF-83.58 KB]
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Abstract:The study quantitatively evaluated whether trucks
equipped with electronic hours-of-service recorders
(EHSRs) have a lower (or higher) crash and hours-of-service (HOS) violation risk than those without
EHSRs. The safety benefits of EHSRs were
quantitatively evaluated by comparing the crash risk
for two exposure groups (i.e., EHSRs were
considered to improve safety if the trucks with
EHSRs showed a lower crash risk than trucks
without EHSRs).
This project conducted a literature synthesis on
EHSRs and an effectiveness evaluation on EHSRs.
Data were obtained through a third-party vendor
that compiled previously-generated compliance data
regarding participating motor carriers. For this
project, EHSRs were defined as any device that
electronically records drivers’ HOS. There have
been many variations of EHSRs over the years,
such as automatic onboard recording devices
(AOBRDs), electronic onboard recorders (EOBRs),
and functions included in fleet management
systems. Each of these devices has specific
functionality that may or may not be embodied by
the term EHSR
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