Integrated vehicle-based safety systems : heavy-truck field operational test key findings report.
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2010-08-01
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Abstract:This document presents key findings from the heavy-truck field operational test conducted as
part of the Integrated Vehicle-Based Safety Systems program. These findings are the result of
analyses performed by the University of Michigan Transportation Research Institute to examine
the effect of a prototype integrated crash warning system on driving behavior and driver
acceptance. The heavy-truck platform included three integrated crash-warning subsystems
(forward crash, lateral drift, and lane-change/merge crash warnings) installed on a fleet of 10
Class 8 tractors and operated by18 commercial drivers for 10 months. Each truck was
instrumented to capture detailed data on the driving environment, driver behavior, warning
system activity, and vehicle kinematics. Data on driver acceptance was collected through a postdrive
survey and debriefings.
The key findings indicate that integrated crash warning systems not only offer benefits relative to
improved driver performance (e.g., improved headway keeping), but that the majority of
commercial drivers accepted the system and reported subjective benefits from the integrated
system they used. Of the drivers who participated, 15 out of 18 stated that they preferred a truck
with the integrated system, stating that they would also recommend that their company consider
the purchase of vehicles with integrated safety systems installed. No negative behavioral
adaptation effects from the drivers’ 10-month use of the integrated system were observed.
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