Autonomous driving device and autonomous driving control method that displays the following road traveling route

1. An autonomous driving device that is configured to switch a driving mode of a vehicle, the driving mode including (i) a destination setting autonomous driving mode in which the vehicle is controlled to travel using a traveling plan generated based on a target traveling route to a destination set in advance, and (ii) a following road autonomous driving mode in which, when a destination is not set in advance, the vehicle is controlled to travel using a traveling plan generated based on a following road traveling route set along a road, on which the vehicle is traveling, the autonomous driving device comprising:

a display unit configured to present information; and

an electronic control unit programmed to:

select, as the driving mode, the destination setting autonomous driving mode or the following road autonomous driving mode based on a prescribed condition,

control traveling of the vehicle based on the traveling plan of the selected driving mode, and

control the display unit to display a traveling route along the target traveling route when the driving mode is the destination setting autonomous driving mode, and control the display unit display a traveling route along the following road traveling route when the driving mode is the following road autonomous driving mode,

when the display unit is made to display the traveling route along the following road traveling route, control the display unit to display a traveling route from a current position of the vehicle to a nearest branch road in front in a moving direction along the following road traveling route and a moving direction on the nearest branch road along the following road traveling route, and

when the vehicle arrives at the destination during traveling in the destination setting autonomous driving mode, select, as the driving mode, the following road autonomous driving mode in place of the destination setting autonomous driving mode.

2. The autonomous driving device according to claim 1 , wherein:

the electronic control unit is programmed to further detect a presence or absence of an occupant of the vehicle;

in a state in which the electronic control unit detects that the occupant is in the vehicle, when the vehicle arrives at the destination during traveling in the destination setting autonomous driving mode, the electronic control unit is configured to select, as the driving mode, the following road autonomous driving mode in place of the destination setting autonomous driving mode; and

in a state in which the electronic control unit detects that no occupant is in the vehicle, when the vehicle arrives at the destination during traveling in the destination setting autonomous driving mode, the electronic control unit is configured to stop the vehicle.

3. The autonomous driving device according to claim 1 , further comprising an input unit configured to receive an input operation from an occupant, wherein:

the electronic control unit is programmed to, when a distance to the destination is within a predetermined distance while the vehicle is traveling in the destination setting autonomous driving mode, further give notification to an effect that the driving mode is switched from the destination setting autonomous driving mode to the following road autonomous driving mode when the vehicle arrives at the destination; and

the electronic control unit is programmed to select, as the driving mode when the vehicle arrives at the destination, the following road autonomous driving mode in place of the destination setting type-autonomous driving mode based on a reception result in the input unit after the notification is performed.

4. The autonomous driving device according to claim 1 , further comprising:

a GPS receiver configured to measure a position of the vehicle and transmit positional information of the vehicle to the electronic control unit; and

a map database configured to store map information,

wherein the electronic control unit is programmed to recognize a position of the vehicle on the map based on the positional information of the vehicle and the map information.

5. An autonomous driving control method that switches a driving mode of a vehicle with an autonomous driving device including an electronic control unit, the driving mode including (i) a destination setting autonomous driving mode in which the vehicle is controlled to travel using a traveling plan generated based on a target traveling route to a destination set in advance, and (ii) a following road autonomous driving mode in which, when a destination is not set in advance, the vehicle is controlled to travel using a traveling plan generated based on a following road traveling route set along a road, on which the vehicle is traveling, the autonomous driving control method comprising:

selecting, by the electronic control unit, as the driving mode, the destination setting type autonomous driving mode or the following road autonomous driving mode based on a prescribed condition;

controlling, by the electronic control unit, traveling of the vehicle based on the traveling plan of the selected driving mode; and

controlling, by the electronic control unit, a display unit configured to present information to display a traveling route along the target traveling route when the driving mode is the destination setting autonomous driving mode, and controlling, by the electronic control unit, the display unit to display a traveling route along the following road traveling route when the driving mode is the following road autonomous driving mode,

wherein, when the display unit is controlled to display the traveling route along the following road traveling route, the display unit is controlled, by the electronic control unit, to display a traveling route from a current position of the vehicle to a nearest branch road in front in a moving direction along the following road traveling route and a moving direction on the nearest branch road along the following road traveling route, and

when the vehicle arrives at the destination during traveling in the destination setting autonomous driving mode, selecting, as the driving mode, the following road autonomous driving mode in place of the destination setting autonomous driving mode.

6. The autonomous driving control method according to claim 5 , further comprising, detecting, by the electronic control unit, a presence or absence of an occupant of the vehicle, wherein:

when the occupant in the vehicle is detected by the electronic control unit when the vehicle arrives at the destination during traveling in the destination setting autonomous driving mode, the following road autonomous driving mode is selected, by the electronic control unit, as the driving mode in place of the destination setting autonomous driving mode; and

when no occupant in the vehicle is detected by the electronic control unit when the vehicle arrives at the destination during traveling in the destination setting autonomous driving mode, the vehicle is stopped by the electronic control unit.

7. The autonomous driving control method according to claim 5 , further comprising:

when a distance to the destination is within a predetermined distance while the vehicle is traveling in the destination setting autonomous driving mode, giving notification to an effect that the driving mode is switched from the destination setting type-autonomous driving mode to the following road autonomous driving mode when the vehicle arrives at the destination, by the electronic control unit; and

selecting, by the electronic control unit, as the driving mode when the vehicle arrives at the destination, the following road autonomous driving mode in place of the destination setting autonomous driving mode based on a reception result in an input unit configured to receive an input operation from an occupant after the notification is performed.

8. An autonomous driving device that is configured to switch a driving mode of a vehicle, the driving mode including a destination setting autonomous driving mode in which the vehicle is controlled to travel using a traveling plan generated based on a target traveling route to a destination set in advance, and a following road autonomous driving mode in which, when a destination is not set in advance, the vehicle is controlled to travel using a traveling plan generated based on a following road traveling route set along a road, on which the vehicle is traveling, the autonomous driving device comprising:

a display unit configured to present information;

an input unit configured to receive an input operation from an occupant; and

an electronic control unit programmed to:

select, as the driving mode, the destination setting autonomous driving mode or the following road autonomous driving mode based on a prescribed condition,

control traveling of the vehicle based on the traveling plan of the selected driving mode, and

control the display unit to display a traveling route along the target traveling route when the driving mode is the destination setting autonomous driving mode, and control the display unit to display a traveling route along the following road traveling route when the driving mode is the following road autonomous driving mode,

when the display unit is controlled to display the traveling route along the following road traveling route, control the display unit to display a traveling route from a current position of the vehicle to a nearest branch road in front in a moving direction along the following road traveling route and a moving direction on the nearest branch road along the following road traveling route, and

select, as the driving mode, the following road autonomous driving mode in place of the destination setting autonomous driving mode based on a reception result in the input unit.

9. The autonomous driving device according to claim 8 , wherein:

the electronic control unit is programmed to, when a distance to the destination is within a predetermined distance while the vehicle is traveling in the destination setting autonomous driving mode, give notification that the driving mode is switched from the destination setting autonomous driving mode to the following road autonomous driving mode when the vehicle arrives at the destination; and

select, as the driving mode, the following road autonomous driving mode in place of the destination setting autonomous driving mode based on a reception result in the input unit after the notification is performed.