Driving assistant for vehicles

A driving assistant for vehicles that determines whether or not an own vehicle is allowed to enter an adjacent lane that is adjacent to a lane on which the own vehicle is travelling, and provides lane change assistance, the driving assistant for vehicles comprising a processor programmed to:

• estimate a plurality of coming-level time periods in which the own vehicle comes level with respective ones of a plurality of parallel-travelling vehicles on the adjacent lane and provide setting of a proposed lane change section that is a proposed section where the own vehicle enters the adjacent lane, on a basis of positional relation of the own vehicle to one respective one of the plurality of parallel-travelling vehicles with which the own vehicle comes level in a shortest one among the plurality of coming-level time periods;
• and
• determine whether or not the own vehicle is allowed to enter the proposed lane change section, on a basis of a moving speed of the proposed lane change section and a speed of the own vehicle, the moving speed being an average speed of two of the parallel-travelling vehicles in a case where the proposed lane change section is located between two of the plurality of parallel-travelling vehicles, and being a speed of one of the two of the plurality of parallel-travelling vehicles in a case where the proposed lane change section is not located between the two of the plurality of parallel-travelling vehicles, the one of the two of the plurality of parallel-travelling vehicles having the proposed lane change section set forward of or behind the own vehicle, wherein
• when the own vehicle is allowed to enter the proposed lane change section, the processor controls the own vehicle to enter the proposed lane change section.