DRIVE ASSIST SYSTEM FOR VEHICLE

A drive assist system for a vehicle includes: a driving environment recognizer that recognizes driving environment information including a lane marking line and vehicles; a front vehicle extractor that extracts a front vehicle based on the driving environment information; A first driving state classifier that classifies a driving state of the vehicle as one of a first steady driving state, a first lane changing state, and a first target lane driving state, based on lateral movement information of the vehicle and relative position information of the vehicle to the lane marking line; and a second driving state classifier classifies a driving state of the front vehicle as one of a second steady driving state, a second lane changing state, and a second target lane driving state, based on lateral movement information of the front vehicle and relative position information of the front vehicle to the lane marking line.