| CPC B60W 30/18163 (2013.01) [B60W 50/029 (2013.01); B60W 2420/403 (2013.01); B60W 2420/408 (2024.01); B60W 2552/53 (2020.02); B60W 2554/4026 (2020.02); B60W 2554/4029 (2020.02)] | 20 Claims |

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1. An apparatus for driving assistance, the apparatus comprising:
a front sensor installed on a vehicle and having a field of sensing outside the vehicle; and
a controller configured to process data acquired from a navigation device of the vehicle and data acquired from the front sensor,
wherein the controller is configured to:
determine whether the navigation device fails;
maintain, based on road state information determined before a failure of the navigation device, a road state according to the road state information as a state of the travel road for a predetermined time when the navigation device fails; and
after the predetermined time elapses, determine, based on the data acquired from the front sensor, whether a travel road is a road on which a lane change assistance function is operable when the navigation device fails.
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