Toyota 2013 Rav4 Owner's Manual page 210

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4-5. Using the driving support systems
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LDA (Lane Departure Alert)
Summary of function
While driving on a road that has lane markers, this system recognizes
the lane markers using a camera as a sensor to alert the driver when
the vehicle deviates from its lane.
If the system judges that the vehicle may deviate from its lane, it alerts
the driver using beeping and indications on the instrument cluster.
Camera sensor
4
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: If equipped
RAV4_OM_OM42809U_(U)