CITROEN C4 PICASSO - Page 188

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Driving
C4-Picasso-II_en_Chap04_conduite_ed01-2016
Fatigue detection system
Dependingonversion,the"Drivingtime
warningsystem"maybecombinedwiththe
"Fatiguedetectionsystem".
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)).
Once the system considers that the behaviour
ofthevehiclesuggestsacertainleveloffatigue
orinattentionbythedriver,ittriggersthefirst
levelofalert.
Thedriveristhenalertedbythemessage
"Take care!", accompanied by an audible
signal.
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.
Thefollowingsituationsmayinterfere
with operation of the system or prevent
itworking:
- poorvisibility(inadequatelighting
oftheroadway,fallingsnow,heavy
rain,densefog,...),
- dazzle(headlampsofanoncoming
vehicle, low sun, reflections on
adamproad,leavingatunnel,
alternatingshadeandlight,...),
- windscreen area located in front
ofthecamera:dirty,misted,frost-
covered,snow-covered,damaged
orcoveredbyasticker,
- lanemarkingsabsent,worn,
masked(snow,mud)ormultiple
(roadworks,...),
- close to the vehicle ahead (lane
markingsnotdetected),
- roadsthatarenarrow,winding,...