Running control apparatus and running control method for vehicle

A running control apparatus for a vehicle, comprising:

• a vehicle speed difference calculating unit that calculates a difference between a target vehicle speed and an actual vehicle speed;
• a required driving output deciding unit that decides a required driving force or a required driving torque of a driving system of the vehicle on a basis of an integrated value of the difference between the target vehicle speed and the actual vehicle speed such that the actual vehicle speed coincides with the target vehicle speed;
• a driving control unit that controls actuation of the driving system on a basis of the required driving force or the required driving torque;
• and
• a determination unit that determines whether or not the required driving force or the required driving torque is unrealizable in the control of the driving system due to intervention of additional control, wherein the required driving output deciding unit imposes a limit on an increase or a decrease in the required driving force or the required driving torque when the determination unit determines that the required driving force or the required driving torque is unrealizable in the control of the driving system.