Vehicle driving assistance apparatus, vehicle driving assistance method, and computer-readable storage medium storing vehicle driving assistance program

A vehicle driving assistance apparatus executes a deceleration assistance control of autonomously applying a braking force to an own vehicle to decelerate the own vehicle, and a coasting control of causing the own vehicle to coast. The apparatus executes the coasting control when a predetermined coasting condition becomes satisfied in a situation where the apparatus does not detect a deceleration target which creates a need to decelerate the own vehicle. The vehicle driving assistance apparatus executes the deceleration assistance control when the apparatus detects the deceleration target in a situation where the predetermined coasting condition is not satisfied. The apparatus determines whether to execute the coasting control depending on driving operation information on a driving operation carried out by an operator of the own vehicle when the apparatus detects the deceleration target in a situation where the predetermined coasting condition is satisfied.