provided for the braking force however to simplify the calculation the upper limit value is in this embodiment present in a combination of the driving force with the braking force next at a step s 12 controller 50 calculates a target throttle opening angle to achieve a target braking driving force for which a limier process is executed at step s 11 the calculated target throttle opening angle is outputted to engine controller 60 at step s 12 controller 50 a target liquid pressure of the brake to achieve the target braking driving force for which the limiter is provided and calculates a target transmission gear ratio in a case of cvt 85 the target transmission gear ratio is called a target speed ratio to achieve target braking driving force for which the limiter is processed the calculated target speed ratio is outputted to transmission controller 80 then the routine returns to step s 1 engine controller 60 brake controller 70 and transmission controller 80 control braking force and driving force to achieve target throttle opening angle target brake liquid pressure and target speed ratio inputted thereinto respectively as described above in the first embodiment according to the present invention controller 50 calculates target braking driving force for the vehicle to provide the constant vehicle speed in accordance with the manipulated variable in a case where mode selection switch 10 is selected to the parking mode the engine.