Volvo XC90 Owner's Manual page 300

DRIVER SUPPORT
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Pilot Assist
Pilot Assist helps the driver keep the vehicle in
the current traffic lane by providing steering
assistance and maintaining an even speed and a
set time interval to the vehicle ahead.
How Pilot Assist works
The Pilot Assist function is primarily intended for
use on highways and other major roads where it
can help provide a more comfortable and relaxing
driving experience.
The camera/radar sensor monitors the distance to the
vehicle ahead and detects lane markings.
Camera and radar sensor
Distance monitor
Lane marker line monitors
Depending on market, this function can be either standard or optional.
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The driver sets the desired speed and distance to
the vehicle ahead. Pilot Assist monitors the dis-
tance to the vehicle ahead and the traffic lane's
side markers using the camera and radar sensor.
The system maintains the set time interval to the
vehicle ahead by automatically adjusting your
vehicle's speed and keeps your vehicle in its lane
by providing steering assistance.
Pilot Assist's steering assistance is based on
monitoring the direction of the vehicle ahead and
the traffic lane's side marker lines. The driver can
override Pilot Assist's steering recommendations
at any time and steer in another direction, e.g. to
change lanes or avoid obstacles on the road.
If the camera/radar sensor cannot detect the
lane's side marker lines or if Pilot Assist is unable
for some other reason to clearly interpret the
lane, Pilot Assist will temporarily deactivate steer-
ing assistance until it can once again interpret
the lane markings. However, the speed and dis-
tance warnings will remain active.
WARNING
Pilot Assist is deactivated automatically and
resumes working without prior notice.
The color of the steering wheel
symbol indicates the current
status of steering assistance:
• GREEN indicates that steer-
ing assistance is active.
• GRAY (as shown in illustra-
tion) indicates that steering assistance is deacti-
vated.
WARNING
Pilot Assist should only be used if there are
clear lane lines painted on each side of the
lane. All other use will increase the risk of
contact with nearby obstacles that cannot be
detected by the functions.