Information Technology Reference
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drivers did not show a significant increase during driving with the system,
particularly with the dimensions of visual and auditory loads, of stress and
disturbance. The results obtained on a driving simulator will need to be checked in
real situations during the development of the system on the vehicle.
The assistance and information strategies of the VIVRE2 system were perfectly
understood and globally accepted by all the drivers. As for the choice of system that
the drivers would advise installing on trucks of the future, all the subjects chose
visual feedback on a screen for the rear zones and the right side blind spot as a
minimum and more than two-thirds chose the complete informative system (visual
feedback plus light and sound warning). Opinions diverge more regarding the front
view mirror:
some drivers use it without reserve
,
whereas others deem that the size
of the truck tested enables them to see directly in front of the bonnet. For drivers
who did not select the complete system, the choice of luminous and/or sound
warnings seems to be according to the preferential processing channel. Around a
third of subjects preferred only visual warnings
and a quarter preferred only sound
warnings.
Results were more mixed regarding the choice of the complete and “ideal”
VIVRE2 system. These results reflect an important individual variability that cannot
be smoothed out due to the small size of the cross section. This variability is
particularly noticeable when taking account of the covering zone considered.
Globally, a significant result emerges for the
front and back zones
of the vehicle: All
the drivers chose the start inhibit and 75 to 85% completed it with the emergency
braking. Whatever their choices, all the drivers associated the active system with
visual information feedback. However, the
rejection of the regulator
is significant
for a large part of drivers (90 to 100% rejected the regulator, depending on the zone
covered).
Finally, in terms of objective efficiency, for all the simulation protocols for all
subjects, the VIVRE2 system enabled 89% of potentially critical situations to be
avoided.
These results, for the most part positive from an ergonomical (acceptability and
usability), cognitive (comprehension and mental load) and functional point of view,
enabled us to conclude that the system could be developed in its current form on
demonstration vehicles, subject to a few modifications (regulator to be revised, for
example).
In conclusion, the VIVRE2 system, as it was designed and tested, has a certain
advantage in reducing the number of accidents involving vulnerable road users and
industrial vehicles in an urban environment. Nonetheless the development of such a
system requires even more iterative evaluation phases of functional and ergonomic
