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FCW braking and stability system
interventions (ESC, ABS) will also
prevent the system from operating.
Changing lane results in system
inhibition for a certain time.
In addition the road must respect
some characteristics such as minimum-
maximum width, lane clearly defined
by two lane boundaries and only in
limited case for a limited time at least
one.
Each steering of the ABSA system is
always notified to the driver with
acoustic and visual feedback and each
signaling has the same duration as the
steering intervention, with a minimum
of 1 seconds.
Multiple steering interventions are
only allowed if both line lines are
available for the system.
Multiple interventions are allowed
both in terms of visual and acoustic
signals and in terms of steering torque.
If more then three consecutive
interventions are required within a
period of 180 seconds, starting from
the second intervention the acoustic
signal will last 10 seconds longer the
previous one.
Starting from the third acoustic signal
the system will emit a continuous
sound and a message on TFT display
will indicate to keep the center line.
If there is only one line on the road,
when it is correctly detected by the
ABSA system, only one trajectory
correction with relative acoustic signal
will be possible. Until two lines are
displayed again, there will be no
trajectory correction but only acoustic
and visual signals.
Furthermore in case of a single and
very wide lane line, if the system
intervenes by steering in the opposite
direction to the line, this could force
the car to remain slightly misaligned
from the center of the lane, towards
the only available line. This behavior
serves to prevent the intervention that
has just taken place the car off the
road from the side where the lane is
not available.
NOTE:
• In case of wet road or raining
conditions the function could be
disabled by the system in order to
minimize the risks.
• The system is developed to work only
on the lines painted on the road
surfaces, but it may happen that
shadows, traces of old lines, road
edges, etc. are also interpreted as
such.
Driver Assistance Systems
Speed Range of Use
Speed
MPH (km/h)
Minimum
37 (60)
Engaged/activated
37 (60)
Maximum
112 (180)
System Limitation
Because of physical limits the system
to properly operate needs good
visibility (it might not work or not
properly operate in case of heavy
rain, snow, wet roads, fog, direct sun
on the camera, dirty windshield, low
illumination etc.)
Sharp turns, slopes and change in
slopes, poor lane boundaries, as well
as construction areas and all the
scenarios described in this paragraph
may challenge the system, therefore
be always ready to prevent any
unexpected behaviour of the car.
Damaged front bumper, windshield
replaced without proper technical
intervention may also lead to system
malfunction or system unavailability.
Other conditions such as faults, but
not explicitly indicated here may
also prevent/interrupt the system
intervention.
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