Volvo XC60 Owner's Manual page 381

Limitations of Road Sign
Information
The Road Sign Information (RSI
may have limitations in certain situations.
Examples of what can reduce the RSI are as fol-
lows:
Faded signs
•
Signs positioned on bends
•
Rotated or damaged signs
•
Signs positioned high above the roadway
•
Fully/partially obscured or poorly positioned
•
signs
signs completely or partly covered with frost,
•
snow and/or dirt
digital road maps 101 are out-of-date, inaccu-
•
rate or have no speed information
NOTE
The RSI function may interpret some types of
bicycle rack, connected to the electrical
socket for trailers, as a connected trailer. In
such cases, the driver display may show incor-
rect speed information.
100 Road Sign Information
101 In cars equipped with Sensus Navigation*.
Map data with speed information does not exist for all areas.
102
NOTE
The function uses the car's camera unit,
100
) function
which has some general limitations, see the
"Limitations for camera unit" section.
Related information
• Road Sign Information* (p. 372)
Limitations for camera unit (p. 344)
•
102
.
DRIVER SUPPORT
Driver Alert Control
The Driver Alert Control (DAC) function is
intended to help make the driver aware that he
or she is starting to drive less consistently, e.g. if
the driver becomes distracted or starts to fall
asleep.
The objective for DAC is to detect slowly deterio-
rating driving ability and it is primarily intended for
major roads. The function is not intended for city
traffic.
The function is activated when speed exceeds
65 km/h (40 mph) and remains active as long as
the speed is over 60 km/h (37 mph).
DAC reads the position of the car in the lane.
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379
* Option/accessory.