Patent ID: 8060289

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 obstacle 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 at least one of a host vehicle speed and a headway distance between the host vehicle and the preceding obstacle is maintained; an accelerator pedal actuation state detecting section configured to detect an actuation state of an accelerator pedal; and an operating state reporting section configured to report an operating state of the first driving assistance control system based on an operating state of the second driving assistance control system, the risk potential, and the accelerator pedal actuation state; the first driving assistance control system being further configured to control the actuation reaction force exerted by the accelerator pedal as the actuation reaction force exerted by a driver-operated driving operation device; and the operating state reporting section including a reaction force characteristic changing component configured to change an actuation reaction force characteristic exhibited by the accelerator pedal in accordance with the operation ON/OFF status of the first driving assistance control system when the control executed by the second driving assistance control system is overridden due to depression of the accelerator pedal.