Lane Keep Assist - Porsche 911 Manual

Lane Keep Assist

Fig. 106: Windscreen camera
Using the front camera A and within the limits of the
system, Lane Keep Assist detects the course of the
road ahead based on the lane markings. When the
vehicle approaches a detected lane marking and is in
danger of leaving the driving lane, the system ini-
tiates corrective steering intervention that helps to
keep the vehicle in the lane. The driver receives a
visual indication of the steering intervention in the
status display. The driver can override the steering
intervention at any time.
If the vehicle crosses a lane marking without indi-
cating, the system alerts the driver to the fact
acoustically. For this purpose, the acoustic warning
must be enabled in the PCM in the ASSIST
menu.
The system is designed for driving on highways and
well-surfaced country roads and works in a speed
range of approx. 40 mph (65 km/h) – 156 mph
(250 km/h). The operative system does not issue a
warning or steer if the driver indicates before cross-
ing a lane marking. In these situations, the system
interprets the lane change as intentional.
b b Vehicles with Lane Change Assist:
If the vehicle is equipped with Lane Change Assist,
the driver is warned through corrective steering in-
tervention back into lane when changing lanes in a
potentially critical situation. This also happens if the
direction indicator is actuated for the relevant di-
rection. At the same time as a steering intervention,
the relevant side appears in red on the status display
and an acoustic warning (if active) is provided when
the lane marking is crossed over.
Lack of attention
WARNING
The driver remains responsible at all times when
driving, e.g. staying in lane, despite active Lane Keep
Assist. The system is no substitute for attention on
the part of the driver.
– The system can help to keep the vehicle in the
lane within the limits of the system, but it does
not drive it. Keep your hands on the steering
wheel at all times in order to always be ready to
steer. If a warning message appears on the in-
strument cluster, take over control of the vehicle
yourself immediately.
– In the case of heavy braking, for example, cor-
rective steering interventions may not take
place.
– In the case of active steering by the driver, cor-
rective steering intervention can be reduced or
may not take place.
– It is possible that not all lane marking will be de-
tected. Steering intervention can only take place
on the side where a lane marking has been
detected.
– Other road structures or objects may be incor-
rectly identified as lane markings. This can lead
to unexpected or missing steering interventions/
acoustic warnings.
– Corrective steering intervention alone may not
be sufficient to keep the vehicle in the driving
lane in the case of track ruts, winding roads, in-
clined road surfaces or crosswind. The driver
must actively steer in such situations.
e Never use Lane Keep Assist in the following
situations:
– When increased attention is required on the
part of the driver.
– During sporty driving.
– In adverse weather conditions (e.g. fog, snow
or heavy rain).
– Under unfavourable road conditions (includ-
ing bad roads, pot holes, dirty road surfaces).
– In roadworks areas.
– When approaching humps and dips.
– In urban traffic.
– On winding and narrow country roads.
e Drive with extreme care.
e Always pay attention to the traffic situation and
the area around the vehicle.
e Adapt your driving speed to road and weather
conditions.
e Do not attach any objects to the steering wheel.
Failure of camera to de-
WARNING
tect the lane
Camera vision can be impaired by various factors (e.
g. rain, snow, ice, heavy spray, oncoming headlights
or damage). Under certain conditions, the camera
cannot detect the lane markings, or cannot detect
them correctly. In this case, no steering intervention
or unexpected steering intervention can occur.
e Drive with extreme care.
e Keep the direction of travel and the lane lines in
view at all times.
e Clean the camera lens regularly and keep free of
snow and ice.
e Do not cover the camera lens.
e Check the windscreen for damage in the area of
the camera lens at regular intervals.
Lane Keep Assist
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