ONBOARD DISPLAY CONTROL DEVICE, ONBOARD DISPLAY DEVICE, DISPLAY CONTROL METHOD, AND DISPLAY CONTROL PROGRAM

An onboard display device is installed in a vehicle configured to enable autonomous driving. The onboard display device includes an information acquisition section and a display control section. In a case in which the vehicle attempts to merge from a traveling lane into a merging destination lane during autonomous driving, the information acquisition section acquires information regarding a point at which the attempt will be aborted, before the vehicle arrives at the point. The display control section displays the information regarding the point that is acquired by the information acquisition section, before the arrival at the point. at a display portion that is provided within a vehicle cabin of the vehicle.