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228 Driving and operating
Clearing of traffic signs
There are different scenarios that
lead to clearing the currently
displayed traffic signs. After clearing,
the “Default Sign” or a sign from
navigation map data is displayed in
the Driver Information Centre.
Reasons for signs being cleared:
● A predefined distance was driven
or time has elapsed (differs for
each sign type)
● Vehicle drives through a turn
● If no navigation map data is
available and speed drops below
52 km/h (city entry detection)
● If navigation map data is
available and a city entry/exit was
detected due to map data change
Traffic sign detection in
conjunction with navigation
system
If the vehicle is equipped with a
navigation system, the currently
displayed sign can either originate
from optical sign detection or from the
map data.
If the currently displayed sign
originates from map data and the map
information changes, a new sign will
be displayed. This may lead to
detection of a new sign although no
sign on the road may have been
passed.
System limitations
Traffic sign assistant may not operate
properly when:
● Vehicle speed is faster than 200
km/h.
● Driving on winding or hilly roads.
● During nighttime driving.
● Weather limits visibility, such as
fog, rain, or snow.
● The sensor in the windscreen is
blocked by snow, ice, slush, mud,
dirt, windscreen damage or
affected by foreign items, e.g.
stickers.
● The sun is shining directly into
the camera lens.
● Traffic signs are completely or
partially covered or difficult to
discern.
● Traffic signs are incorrectly
mounted or damaged.
● Traffic signs do not comply with
the Vienna Convention on Road
Signs and Signals (Wiener
Übereinkommen über
Straßenverkehrszeichen).
Caution
The system is intended to help the
driver within a defined speed
range to discern certain traffic
signs. Do not ignore traffic signs
which are not displayed by the
system.
The system does not discern any
other than the conventional traffic
signs that might give or end a
speed limit.
Do not let this special feature
tempt you into taking risks when
driving.
Always adapt speed to the road
conditions.
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