Driving support device, driving support method and driving support program

摘要

A first acceleration gear ratio is acquired for accelerating a host vehicle in a first acceleration zone following a first zone ahead of the host vehicle, and a second acceleration gear ratio is acquired for accelerating the host vehicle in a second acceleration zone following a second zone ahead of the first zone. A control is executed to set the gear ratio of the host vehicle to the first acceleration gear ratio in a first deceleration zone in order to decelerate the host vehicle before entering the first zone. A control is executed to set the gear ratio of the host vehicle to the second acceleration gear ratio when the host vehicle must decelerate with respect to the second zone while traveling in the first acceleration gear ratio.