Vehicle traveling support apparatus

A vehicle traveling support apparatus comprising:

• a sensor for recognizing a lane marker on a traveling lane in which an own vehicle is traveling;
• and
• an electronic control unit for performing a lane keeping control to control a steering angle of said own vehicle so as to have said own vehicle travel along a target traveling line set based on at least any one of a left lane marker and a right lane marker recognized by said sensor, said left lane marker being on a left side with respect to said own vehicle, said right lane marker being on a right side with respect to said own vehicle,
• wherein,
• when performing said lane keeping control,
• said electronic control unit is configured:
• to execute at least any one of:
• a process to control said steering angle so as to match a magnitude of said steering angle with a steering angle guard value when said magnitude of said steering angle exceeds said steering angle guard value;
• and
• a process to control said steering angle so as to match a magnitude of a steering angle speed which is an amount of change per unit time of said steering angle with a steering angle speed guard value when said magnitude of said steering angle speed exceeds said steering angle speed guard value;
• and
• to set, when a recognition state of said lane marker by said sensor is a one side lane marker recognizable state which is a state where said sensor can recognize only one of said left lane marker and said right lane marker, said steering angle guard value and/or said steering angle speed guard value corresponding to one or more of said executed processes to a value which is smaller than when said recognition state of said lane marker is a both lane markers recognizable state which is a state where said sensor can recognize both said left lane marker and said right lane marker.