Automatic steering control apparatus

An automatic steering control apparatus configured to perform an automatic steering control that causes a vehicle to travel along a target traveling path, the automatic steering control apparatus comprising:

• a lane line detector configured to detect right and left lane lines that define a lane along which the vehicle travels;
• a shape data detector configured to detect shape data, the shape data having a corresponding relationship with a road shape of the lane and excluding the right and the left lane lines;
• a traveling processor configured to execute a traveling control that controls a traveling state of the vehicle;
• and
• a steering angle processor configured to control a steering angle of the vehicle on a basis of a command signal from the traveling processor, wherein
• the traveling processor is configured to, in a case where both the right and the left lane lines are detected by the lane line detector, execute a first lane-line control, the first lane-line control being the automatic steering control to be executed on a basis of both the right and the left lane lines, and
• the traveling processor is configured to, in a case where only one of the right and the left lane lines is detected by the lane line detector as a detected lane line, execute a determining process that compares data on the detected lane line and the shape data and that determines whether to execute a second lane-line control, the second lane-line control being the automatic steering control to be executed on a basis of only the one of the right and the left lane lines.