Driving authority transfer device

An authority transfer device used for a vehicle having an autonomous driving mode in which driving operation is autonomously performed for a driver and a manual driving mode in which driving operation is manually performed by the driver using at least a steering wheel, the authority transfer device comprising a processor configured, when switching from the autonomous driving mode to the manual driving mode, to transfer a driving authority of the vehicle to the driver on condition that at least a grip of the driver on the steering wheel is detected, and one or more selected from the group consisting of:

• a notifier to notify the driver that the driving authority will be transferred before the driving authority is transferred;
• a notifier to notify the driver that a grip on the steering wheel is detected before the driving authority is transferred;
• and
• a notifier to notify the driver of a remaining time before the driving authority is transferred.