Operating Conditions For Each Function; Lane Departure Warning Function; Lane Keeping Assist Function - Lexus GS350 Owner's Manual

Operating conditions for each function

Lane departure warning function

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When the vehicle speed is approximately 30 mph (48 km/h) or
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more
When the lane width is more than approximately 9.8 ft. (3.0 m)
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When driving on a straight road or through a curve with a radius of
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more than approximately 394 ft. (120 m)

Lane keeping assist function

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When the vehicle speed is between approximately 45 and 112 mph
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(72 and 180 km/h)
When the vehicle-to-vehicle distance mode of the radar cruise
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control is on, and the set vehicle speed is approximately 45 mph (72
km/h) or more (the function will not operate when the radar cruise
control is in set speed mode)
When the lane width is between approximately 9.8 and 13.1 ft.
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(3.0 and 4.0 m)
When driving on a straight road or through a curve with a radius of
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more than approximately 656 ft. (200 m)
GS350_OM_OM30D41U_(U)
4-5. Using the driving support systems
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