G12�Driver�Assistance�Systems
22.�Lane�&�Traffic�Jam�Assistant
138
The�system�has�two�sub-functions:�the�traffic�jam�assistant�(second�generation)�and�the�lane�control
assistant.
The�traffic�jam�assistant�can�be�used�within�the�speed�range�of�0�to�70�km/h,�the�lane�control�assistant
on�the�other�hand�from�70to�210�km/h.
The�table�below�shows�an�overview�of�the�differences�between�the�two�sub-functions:
Traffic�Jam�Assist Lane�Control�Assistant
Speed�range�0�-�70�km/h Speed�range�70�-�210�km/h
Corrective�steering�interventions�in�the
direction�of�the�vehicle�driving�ahead
Corrective�steering�interventions�in�the
direction�of�the�center�of�the�lane
Detected�lane�markings�taken�into
consideration
Gaps�in�lane�markings�can�be�bridged�for�a
limited�time�by�aligning�with�vehicle�ahead
If�the�traffic�jam�and�lane�control�assistants�are�activated,�the�side�collision�warning�is�also�interlinked.
22.1.1.�Hands-off-Detection
To�ensure�the�driver�is�alert�and�able�to�react,�he�is�urged�to�always�have�both�hands�on�the�steering
wheel�when�the�steering�and�lane�control�assistant�including�traffic�jam�assistant�are�activated
(established�in�the�German�road�traffic�regulations).�If�the�driver�takes�both�hands�off�the�steering
wheel�rim,�control�is�stopped�after�a�few�seconds�during�active�control�and�the�driver�is�requested�to
take�over�steering.
A�capacitive�sensor�(hands-off�detection�sensor)�with�corresponding�touch�detection�electronics�in
the�steering�wheel�determines�whether�the�steering�wheel�is�being�touched.
The�electronic�touch�detection�is�installed�in�the�steering�wheel�below�the�driver's�airbag.
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