Highway Driving Assist settings
Setting

With the POWER button in the ON position, select or deselect “User settings → Driver Assistance→ Highway Driving Assist” on the LCD display to set whether or not to use each function.
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If 'Highway Driving Assist' is selected, it helps maintain distance from the vehicle ahead, maintain the set speed, and keep the vehicle between lanes.

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If there is a problem with the functions, the settings cannot be changed. Have your vehicle inspected by an authorized Kia dealer.
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If the vehicle is restarted, the functions will maintain the last setting.

For your safety, change the Settings after parking the vehicle at a safe location.