A vehicle driving assist system has a host vehicle risk factor detection section, a peripheral risk factor detection section, a host vehicle risk potential calculation section, a peripheral risk potential calculation section and a risk potential notification section. The host vehicle risk factor detection section detects host vehicle risk factors related to a host vehicle. The peripheral risk factor detection section detects peripheral risk factors in an area around the host vehicle. The host vehicle risk potential calculation section calculates a host vehicle risk potential attributed to the host vehicle risk factors. The peripheral risk potential calculation section calculates a peripheral risk potential attributed to the peripheral risk factors. The risk potential notification section notifies a driver of the host vehicle risk potential and the peripheral risk potential using a common risk notification device for both notifications.
Vehicle driving assist system