Roadside driving support device, in-vehicle driving support device, and driving support system

摘要

An in-vehicle driving support device 2 that provides driving support based on the presence of a non-priority vehicle A entering the priority road 50 from the non-priority road 40. When the host vehicle travels on the priority road 50, it is received from outside the vehicle. By providing the information provision determination device 34 that determines whether or not driving assistance is necessary based on the specifications related to driving assistance of the non-priority vehicle A, it can be avoided that the driver feels troublesome.