Volvo S80 - Driver Alert System - DAC

04 Driver support
Driver Alert System - DAC*
04
* Option/accessory, for more information, see Introduction.
179
General information on DAC
The DAC (Driver Alert Control) function is
intended to attract the driver's attention when
he/she starts to drive less consistently, e.g. if
he/she becomes distracted or starts to fall
asleep.
A camera detects the side markings painted on
the carriageway and compares the section of
the road with the driver's steering wheel move-
ments. The driver is alerted if the vehicle does
not follow the carriageway evenly.
NOTE
The camera sensor has certain limitations,
see page 175.
The objective for DAC is to detect slowly dete-
riorating driving ability and it is primarily
intended for major roads. The function is not
intended for city traffic.
In some cases driving ability is not affected
despite driver fatigue. In which case there may
not be any warning issued for the driver. For
this reason it is always important to stop and
take a break in the event of any signs of driver
fatigue, irrespective of whether or not DAC
issues a warning.
NOTE
The function must not be used to extend a
driving stint. Always plan breaks at regular
intervals and ensure that you are fully
rested.
Limitation
In some cases the system may issue a warning
despite driving ability not deteriorating, for
example:
•
if the driver tests the LDW function.
•
in strong side winds.
•
on rutted road surfaces.
Operation
Some settings are made from the centre con-
sole display screen and its menu system. For
information on how the menu system is used,
see page 200.
The current status of Driver Alert can be
checked on the trip computer display with the
thumbwheel on the left-hand stalk switch.
Thumbwheel. Turn until the display shows
Driver
Alert
. On the second row the options
Driver Alert Standby <65 km/h, Driver
Alert
Unavailable
or level mark can be
shown.
OK confirms or clears a warning in the
memory.