Driving assistance method, and driving assistance device, information presentation device, and recording medium using same

1. A driving assistance device configured to be installed in a vehicle in which a driving mode is selected from either an automatic driving mode or a manual driving mode for traveling, the driving assistance device comprising:

a receiver that receives a switching request for switching of the driving mode;

a generator that generates switching notification information in accordance with the switching request received by the receiver, before the switching of the driving mode is completed, the switching notification information indicating as a switching notice that the switching in the switching request is to be performed;

an output unit that outputs the switching notification information generated by the generator to a presentation unit that presents, outward from the vehicle, the switching notice indicated by the switching notification information, before the switching of the driving mode is completed; and

a detector that detects a state of a driver,

wherein when the switching request received by the receiver indicates switching from the automatic driving mode to the manual driving mode, the generator derives information indicating a degree of completion of a preparation for a driving operation by the driver, based on the state detected by the detector, and generates the switching notification information including the information derived, before the switching of the driving mode is completed.

2. The driving assistance device according to claim 1 , wherein

after receiving a switching request to switch from the manual driving mode to the automatic driving mode, the receiver receives a completion notification indicating that the switching to the automatic driving mode is completed,

the generator generates the switching notification information when the receiver receives the switching request to switch from the manual driving mode to the automatic driving mode, and generates mode information indicating the automatic driving mode when the receiver receives the switching completion notification, and

the output unit outputs the switching notification information generated by the generator to the presentation unit to cause the presentation unit to present the switching notice indicated by the switching notification information, and outputs the mode information generated by the generator to the presentation unit to cause the presentation unit to stop presentation of the switching notice indicated by the switching notification information.

3. The driving assistance device according to claim 1 , wherein the generator generates the switching notification information in a mode according to the presentation unit, before the switching of the driving mode is completed.

4. An information presentation device configured to be installed in a vehicle in which a driving mode is selected from either an automatic driving mode or a manual driving mode for traveling, the information presentation device comprising:

a receiver that receives a switching request for switching of the driving mode;

a generator that generates switching notification information in accordance with the switching request received by the receiver, before the switching of the driving mode is completed, the switching notification information indicating as a switching notice that the switching in the switching request is to be performed;

an output unit that outputs the switching notification information generated by the generator, before the switching of the driving mode is completed;

a presentation unit that presents, outward from the vehicle, the switching notice indicated by the switching notification information output from the output unit, before the switching of the driving mode is completed; and

a detector that detects a state of a driver,

wherein when the switching request received by the receiver indicates switching from the automatic driving mode to the manual driving mode, the generator derives information indicating a degree of completion of a preparation for a driving operation by the driver, based on the state detected by the detector, and generates the switching notification information including the information derived, before the switching of the driving mode is completed.

5. A driving assistance method in a driving assistance device configured to be installed in a vehicle in which a driving mode is selected from either an automatic driving mode or a manual driving mode for traveling, the driving assistance method comprising:

receiving a switching request for switching of the driving mode;

generating switching notification information in accordance with the switching request received, before the switching of the driving mode is completed, the switching notification information indicating as a switching notice that the switching in the switching request is to be performed;

outputting the switching notification information generated to a presentation unit that presents, outward from the vehicle, the switching notice indicated by the switching notification information, before the switching of the driving mode is completed; and

detecting a state of a driver,

wherein when the switching request received indicates switching from the automatic driving mode to the manual driving mode, the generating includes:

deriving information indicating a degree of completion of a preparation for a driving operation by the driver, based on the state of the driver, and

generating the switching notification information including the information derived, before the switching of the driving mode is completed.

6. A non-transitory machine-readable recording medium that stores a program that, when executed by a computer of a driving assistance device to be installed in a vehicle in which a driving mode is selected from either an automatic driving mode or a manual driving mode for traveling causes the computer to:

receive a switching request for switching of the driving mode;

generate switching notification information in accordance with the switching request received, before the switching of the driving mode is completed, the switching notification information indicating as a switching notice that the switching in the switching request is to be performed;

output the switching notification information generated, to a presentation unit that presents, outward from the vehicle, the switching notice indicated by the switching notification information, before the switching of the driving mode is completed; and

detect a state of a driver,

wherein, when the switching request received indicates switching from the automatic driving mode to the manual driving mode, the program causes the computer to:

derive information indicating a degree of completion of a preparation for a driving operation by the driver, based on the state of the driver, and

generate the switching notification information including the information derived, before the switching of the driving mode is completed.