Volvo XC90: Driver support / Driver Alert Control limitations
Driver Alert Control (DAC) functionality may be reduced in certain situations.
In certain situations, the system may provide a warning even if it has not detected
a change in driving behavior, e.g.:
- in strong crosswinds
- on grooved road surfaces.
WARNING
In certain cases, driving behavior might not be affected despite the driver's
fatigue – when using the Pilot Assist* function – resulting in the driver not getting
a warning from DAC.
It is therefore very important to always stop and take a break at the slightest
sign of fatigue, regardless of whether the function has issued a warning or not.
NOTE
The function uses the vehicle's camera and radar sensor, which has certain
general limitations.
* Option/accessory.
In vehicles equipped with Sensus Navigation*, the driver can activate a guide
that can automatically suggest a suitable rest stop if the Driver Alert Control
(DAC) warning is given...
(Option/accessory.)
The Distance Alert function can help the driver become aware if the time interval
to the vehicle in front is too short. The vehicle must be equipped with a head-up
display* in order to display Distance Alert...
Other information:
Using snow chains and/or snow tires can help improve traction in winter driving
conditions.
Volvo does not recommend use of snow chains on wheel dimensions larger than 19
inches
WARNING
Use Volvo genuine snow chains or equivalent snow chains that are suitable
for the vehicle model and the tire and wheel sizes...
The Driver Alert Control (DAC) function is designed to help alert the driver
to erratic behavior, e.g. if the driver is distracted or showing signs of fatigue.
The objective of the function is to detect slowly deteriorating driving behavior
and is primarily intended to be used on major roads...