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This report presents the methodology and results of the independent
evaluation of a prototype integrated crash warning system for light
vehicles as part of the Integrated Vehicle-Based Safety Systems
initiative of the United States Department of Transportation's
Intelligent Transportation System program. The system integrates
rear-end crash, curve-speed warning, lane change crash, and lane
departure warning functions. The goals of the independent
evaluation are to assess the safety impact, gauge driver
acceptance, and characterize the capability of the integrated
safety system. The evaluation is based on naturalistic driving data
collected from a field operational test using 108 subjects who
drove 16 passenger vehicles equipped with a prototype integrated
safety system and a data acquisition system. The test subjects
accumulated over 213,000 miles during a 12-month period throughout
parts of southeast Michigan. For each driver, the test period was
divided into a 12 day baseline condition with the system disabled
and a 28 day treatment condition with the system enabled to compare
the effect of the system on driving performance. The results of the
analysis suggest that driving with the integrated safety system
improves driver behavior and increases driver safety, that drivers
feel that the system provides a safety benefit, and that the system
alerts had a high degree of accuracy. This report delineates the
methodology of the different analyses and discusses their results.
This report presents results from the independent evaluation of a
field operational test using a fleet of heavy trucks outfitted with
a prototype integrated crash warning system. This effort was
conducted as part of the U.S. DOT's Integrated Vehicle-Based Safety
Systems (IVBSS) program. The system tested included rear-end,
lane-change/merge, and lane departure crash warning functions. The
goals of the evaluation were to assess safety impact and driver
acceptance, and to characterize the prototype system's warning
capabilities. Eighteen volunteer drivers from a commercial fleet
operated the 10 equipped heavy trucks, accumulating 600,000 miles
over a 10-month period. The test period consisted of 2 months of
baseline driving, when the system was disabled, and an 8-month
treatment period, when the system was enabled and warnings were
presented to the drivers. Comparisons were made between baseline
driving and the treatment period to determine the effect of system
use on driver behavior and performance.
This report presents results from a series of on-road verification
tests performed to determine the readiness of a prototype
integrated warning system to advance to field testing, as well as
to identify areas of system performance that should be improved
prior to the start of the field test planned for 2009. Data was
collected from tests conducted on public roads using a 2007 Honda
Accord equipped with the prototype safety system. The system
provides forward crash warning (FCW), lane departure warning (LDW),
curve speed warning (CSW), and lane change/merge (LCM) functions,
managed by an arbitration function that addresses multiple crash
threats. The objectives of the on-road tests were to drive the test
vehicle in an uncontrolled driving environment to measure the
system's susceptibility to nuisance alerts, assess alerts in
perceived crash situations, and evaluate system availability.
This report presents results from a series of on-road verification
tests performed to determine the readiness of a prototype
integrated warning system to advance to field testing, as well as
to identify areas of system performance that should be improved
prior to the start of the field test planned for 2009. Data was
collected from tests conducted on public roads using an
International 8600 heavy truck equipped with the prototype safety
system. The prototype system provides forward crash warning (FCW),
lane change merge (LCM), and lane departure warning (LDW) functions
managed by an arbitration function to address multiple crash
threats. The objectives of the on-road tests were to operate the
heavy truck in an uncontrolled driving environment to measure the
system's susceptibility to nuisance alerts, assess alerts in
perceived crash situations, and evaluate the system availability.
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