LANE DEPARTURE ALARM DEVICE OF VEHICLE

PROBLEM TO BE SOLVED: To provide a lane departure alarm device of a vehicle that recognizes the lane of the traveling direction and determines lane departure even when the front face of the vehicle does not match with the vehicle traveling direction, for example, during turning. SOLUTION: When own-vehicle traveling lane LA on which one's own vehicle CA travels is linear, or has a radius smaller than a turn radius R1, a CCD camera 2 is positioned at a standard reference position facing the front face of the own vehicle CA and a traveling boundary lines of both right and left sides are imaged in an imaging region, so that an alarm means can be operated based on the recognized traveling boundary lines La and Lb. When the traveling boundary lines La and Lb turn right, the turn direction is previously recognized based on travel road information. When the vehicle comes into a turn road, the imaging direction C of the CCD camera 2 is rotated correspondingly to the turning direction. Thus, deviation from the imaging region of the traveling boundary lines La and Lb can be prevented, and lane departure determination can be performed certainly. COPYRIGHT: (C)2010,JPO&INPIT