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197
6
Driving
- the ignition has been switched off for a few
minutes,
- the driver's seat belt is unfastened and their
door is open.
As soon as the speed of the vehicle drops
below 40 mph (65 km/h), the system goes
into standby.
The driving time is counted again once the
speed is above 40 mph (65 km/h).
Driver inattention alert
Depending on version, the "Driving time
warning" may be combined with the "Driver
inattention alert".
After three first level alerts, the system triggers
a new alert with the message "Take a break!",
accompanied by a more pronounced audible
signal.
In certain driving conditions (poor road
surface or strong winds), the system may
give alerts independent of the driver's
level of vigilance.
Using a camera placed at the top
of the windscreen, the system
assesses the driver's level of
vigilance by identifying variations
in trajectory compared to the lane
markings.
This system is particularly suited to fast roads
(speed higher than 40 mph (65 km/h)).
The following situations may interfere with
the operation of the system or prevent it
working:
- poor visibility (inadequate lighting of
the roadway, falling snow, heavy rain,
dense fog, etc.),
- dazzle (headlamps of an oncoming
vehicle, low sun, reflections on a damp
road, leaving a tunnel, alternating
shade and light, etc.),
- windscreen area located in front of the
camera: dirty, misted up, frost-covered,
snow-covered, damaged or covered by
a sticker,
- lane markings absent, worn, hidden
(snow, mud) or multiple (roadworks,
etc.),
- close to the vehicle ahead (lane
markings not detected),
- roads that are narrow, winding, etc.
When the system interprets the behaviour of
the vehicle as indicating a certain fatigue or
inattention threshold on the part of the driver, it
triggers the first level of alert.
The driver is then alerted by the message
"Take care!", accompanied by an audible
signal.
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