DRIVER SUPPORT
Related information
Road Sign Information* (RSI) -
Driver Alert System*
Road Sign Information* (RSI) (p. 242)
limitations
•
The Driver Alert System is intended to assist dri-
vers whose driving ability is deteriorating or who
are inadvertently leaving the lane they are driving
on.
The Road Sign Information (RSI32) function may
have limitations in certain situations.
Road Sign Information (RSI)* - operation
•
(p. 243)
The camera sensor for RSI has limitations just
like the human eye. Find out more about this in
the section on the camera sensor limitations
(p. 234).
The Driver Alert System consists of different
functions which can either be switched on at the
same time or individually:
Driver Alert Control - DAC (p. 247).
Lane Keeping Aid (p. 251).
•
•
Signs which indirectly provide information on a
prevailing speed limit, e.g. name signs for towns/
districts, are not recorded by RSI.
A switched-on function is set in standby mode
and is not activated automatically until speed
exceeds 65 km/h (40 mph).
Examples of factors that can reduce RSI are as
follows:
Faded signs
The function is deactivated again when speed
decreases to below 60 km/h (37 mph).
•
Signs positioned on bends
•
•
•
•
The functions use a camera which is dependent
on the lane having side markings painted on
each side.
Rotated or damaged signs
Signs positioned high above the roadway
Fully/partially obscured or poorly positioned
signs
WARNING
signs completely or partly covered with frost,
snow and/or dirt
digital road maps33 are out-of-date, inaccu-
rate or have no speed information34
•
•
Driver Alert System does not work in all situa-
tions but is designed merely as a supplemen-
tary aid.
.
The driver always bears ultimate responsibility
for ensuring that the vehicle is driven safely.
32
33
34
Road Sign Information
In cars equipped with Sensus Navigation.
Map data with speed information does not exist for all areas.
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* Option/accessory. 245
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