Vehicle control device, vehicle control method, and non-transitory computer readable medium storing vehicle control program

A vehicle control method comprising:

• acquiring speech data from a speech of a speaker;
• acquiring image data including an image of the speaker, the image data including a complexion, a facial expression, and a motion of the speaker;
• determining whether or not the speaker indicated by the speech data is a driver;
• determining, using an alcohol level determining model, an alcohol level based on the speech data and the complexion, the facial expression, and the motion of the speaker from the image data;
• acquiring the speech data from speech for performing a start operation, the start operation being an operation performed by the driver with respect to a vehicle to start driving the vehicle, wherein the start operation is performed by the speech of the driver;
• determining whether the speaker is in an intoxicated state outside of the vehicle, based on the alcohol level;
• upon determination that the speaker is in an intoxicated state outside of the vehicle, restricting an operation of opening a driver's door of the vehicle;
• upon determination that the speaker is not in an intoxicated state outside of the vehicle, and after an opening of the driver's door of the vehicle, determining whether the speaker is in an intoxicated state in a driver's seat of the vehicle based on the alcohol level;
• and
• upon determination that the speaker is in an intoxicated state in the driver's seat of the vehicle, restricting starting of an engine of the vehicle.

A non-transitory computer readable medium storing a vehicle control program causing a computer to execute a process for controlling a vehicle, the process comprising:

• acquiring speech data from a speech of a speaker;
• acquiring image data including an image of the speaker, the image data including a complexion, a facial expression, and a motion of the speaker;
• determining whether or not the speaker indicated by the speech is a driver;
• determining, using an alcohol level determining model, an alcohol level based on the speech data and the complexion, the facial expression, and the motion of the speaker from the image data;
• acquiring the speech data from speech for performing a start operation, the start operation being an operation performed by the driver with respect to the vehicle to start driving the vehicle, wherein the start operation is performed by the speech of the driver;
• determining whether the speaker is in an intoxicated state outside of the vehicle, based on the alcohol level;
• upon determination that the speaker is in an intoxicated state outside of the vehicle, restricting an operation of opening a driver's door of the vehicle;
• upon determination that the speaker is not in an intoxicated state outside of the vehicle, and after an opening of the driver's door of the vehicle, determining whether the speaker is in an intoxicated state in a driver's seat of the vehicle, based on the alcohol level;
• and
• upon determination that the speaker is in an intoxicated state in the driver's seat of the vehicle, restricting starting of an engine of the vehicle.