Patent ID: 8670915

Claim:
A vehicle driving assist system comprising: a preceding object detecting section configured to detect a preceding object existing in front of a host vehicle; a risk potential calculating section configured to calculate a risk potential indicative of a degree of convergence between the host vehicle and the preceding object based on a detection result of the preceding object detecting section; a first driving assistance control system configured to control at least one of an actuation reaction force exerted by a driver-operated driving operation device and a braking/driving force exerted against the host vehicle based on the risk potential calculated by the risk potential calculating section; a second driving assistance control system configured to control the braking/driving force of the host vehicle such that a headway distance is maintained between the host vehicle and the preceding object; a transition detecting section configured to detect a transition of operating states between the first and second driving assistance control systems; and a control adjusting section configured to adjust at least one of the braking/driving force and the actuation reaction force during transition between the first and second driving assistance control systems, the control adjusting section being configured to give priority to the control executed by the second driving assistance control system over the control executed by the first driving assistance control system while both the first and second driving assistance control systems are in an operable state, the control adjusting section being further configured to execute the control of the first driving assistance control system while both the first and second driving assistance control systems are in the operable state and while an accelerator pedal is depressed by a driver.