VEHICLE DRIVING ASSIST APPARATUS

A vehicle driving assist apparatus acquires a longitudinal distance between an own vehicle and an oncoming vehicle, and a lateral distance between the own vehicle and the oncoming vehicle. The vehicle driving assist apparatus acquires a collision index value which decreases as a ratio of the longitudinal distance to the lateral distance decreases and determine that the own vehicle potentially collides with the oncoming vehicle when a turning condition is satisfied, and a collision condition is satisfied. The turning condition is a condition that the own vehicle turns, crossing an oncoming traffic lane. The collision condition is a condition that the collision index value is within a predetermined index value range. The predetermined index value range at least includes the collision index value acquired when the longitudinal distance is equal to the lateral distance.