Driving support system

A driving support system comprising:

• a forward information acquirer configured to acquire forward information regarding a state ahead of an own vehicle that is a saddle type vehicle;
• a rearward information acquirer configured to acquire rearward information regarding a state behind the own vehicle;
• and
• a driving support controller configured to set a preceding vehicle recognized on a basis of the forward information as a tracking target and execute tracking control of causing the own vehicle to automatically track the tracking target,
• wherein the driving support controller includes as control modes of the tracking control,
• a first platooning mode in which while a first preceding vehicle that is a saddle type vehicle traveling laterally ahead of the own vehicle and a second preceding vehicle that is a saddle type vehicle traveling ahead of the first preceding vehicle along a traveling direction and traveling at a closer position than the first preceding vehicle along a vehicle width direction are recognized on a basis of the forward information, the driving support controller sets the first preceding vehicle as the tracking target in a case where a distance between preceding vehicles that is a distance between the first preceding vehicle and the second preceding vehicle is greater than a predetermined distance threshold, and sets the second preceding vehicle as the tracking target in a case where the distance between the preceding vehicles is less than the distance threshold, and
• a second platooning mode in which while an offset preceding vehicle that is a saddle type vehicle traveling laterally ahead of the own vehicle and an offset subsequent vehicle that is a saddle type vehicle traveling laterally behind the own vehicle are recognized on a basis of the forward information and the rearward information, the offset preceding vehicle is set as the tracking target, and is capable of executing the tracking control under one of the control modes, and
• wherein in a case where the offset preceding vehicle goes out of a detection range of the forward information acquirer while the tracking control is executed under the second platooning mode, the driving support controller sets a virtual offset preceding vehicle determined on the basis of the rearward information as the tracking target.