Travel control device

1. A travel control device comprising:

a lane change controller that automatically guides a vehicle from a traveling lane to another lane as a lane change destination;

a display device;

a display controller that displays a guide indication for a lane change on the display device based on lane change information from the lane change controller, wherein the display controller displays the traveling lane and the another lane on the display device based on the lane change information and displays the guide indication including a starting position of the lane change and a finishing position of the lane change simultaneously on the displayed traveling lane and the displayed another lane, respectively; and

a real image acquisition controller that acquires a real image by imaging the traveling lane on which a subject vehicle travels and the another lane adjacent to the traveling lane,

wherein

the lane change controller automatically generates a track of the lane change of the subject vehicle based on the acquired real image and automatically performs the lane change in accordance with the generated track of the lane change, and

the display controller:

displays the acquired real image or a computer graphic image that includes at least a lane mark based on the real image on the display device,

displays the guide indication including the starting position of the lane change and the finishing position of the lane change on the lane mark in the real image or the lane mark in the computer graphic image, displayed on the display device, the starting position of the lane change and the finishing position of the lane change being generated by the lane change controller, and

displays a lane keeping guide indication from a position corresponding to a time when a direction indicator starts blinking to the starting position of the lane change on the display device with the displayed lane mark, the lane keeping guide indication indicating to stay in the traveling lane.

2. The travel control device according to claim 1 , wherein

the display controller displays the lane keeping guide indication shifted toward the another lane.

3. The travel control device according to claim 1 , wherein

the display controller displays the finishing position of the lane change on the another lane, and further displays a second lane keeping guide indication on the another lane at a position behind the finishing position of the lane change on the display device, the second lane keeping guide indication indicating to stay in the another lane.

4. The travel control device according to claim 1 , further comprising:

a reporting device that includes the display device, wherein

in a case where a driver operates a direction indication operating element and where the lane change controller assesses that automatically performing the lane change is not feasible or where the lane change controller determines that continuing the lane change is not appropriate after the lane change is started, the reporting device reports an assessment result that starting or continuing the lane change is not feasible.

5. The travel control device according to claim 1 , wherein

the lane change controller automatically generates a track for returning to a change origin lane in a case where the lane change controller detects automatically performing the lane change is not feasible after a track of the lane change of a subject vehicle is automatically generated and the starting position of the lane change and the finishing position of the lane change is displayed on the display device, and

the display controller displays the guide indication for returning to the change origin lane on the display device that displays the lane mark in a case where the track for returning to the change origin lane is automatically generated.

6. The travel control device according to claim 1 , wherein

the display controller displays the guide indication for the lane change on the display device before the lane change controller starts automatic lane change.

7. The travel control device according to claim 1 , wherein

the lane keeping guide indication has a strip shape extending along the lane.

8. A vehicle control method executed by an on-board computer, the method comprising:

(i) performing a lane change by automatically guiding a vehicle from a traveling lane to another lane as a lane change destination by using a lane change information;

(ii) displaying the traveling lane and the another lane on a display device based on the lane change information and displaying a guide indication including a starting position of the lane change and a finishing position of the lane change simultaneously on the displayed traveling lane and the displayed another lane, respectively;

(iii) acquiring a real image by imaging the traveling lane on which a subject vehicle travels and the another lane adjacent to the traveling lane,

wherein the step (i) automatically generates a track of the lane change of the subject vehicle based on the acquired real image and automatically performs the lane change in accordance with the generated track of the lane change, and

wherein the step (ii):

displays the acquired real image or a computer graphic image that includes at least a lane mark based on the real image on the display device,

displays the guide indication including the starting position of the lane change and the finishing position of the lane change on the lane mark in the real image or the lane mark in the computer graphic image, displayed on the display device, and

displays a lane keeping guide indication from a position corresponding to a time when a direction indicator starts blinking to the starting position of the lane change on the display device with the displayed lane mark, the lane keeping guide indication indicating to stay in the traveling lane.

9. A non-transitory computer readable medium storing a vehicle control program for causing an on-board computer to execute processing, the processing comprising:

(i) performing a lane change by automatically guiding a vehicle from a traveling lane to another lane as a lane change destination by using a lane change information;

(ii) displaying the traveling lane and the another lane on a display device based on the lane change information and displaying a guide indication including a starting position of the lane change and a finishing position of the lane change simultaneously on the displayed traveling lane and the displayed another lane, respectively;

(iii) acquiring a real image by imaging the traveling lane on which a subject vehicle travels and the another lane adjacent to the traveling lane,

wherein the step (i) automatically generates a track of the lane change of the subject vehicle based on the acquired real image and automatically performs the lane change in accordance with the generated track of the lane change, and

wherein the step (ii):

displays the acquired real image or a computer graphic image that includes at least a lane mark based on the real image on the display device,

displays the guide indication including the starting position of the lane change and the finishing position of the lane change on the lane mark in the real image or the lane mark in the computer graphic image, displayed on the display device, and

displays a lane keeping guide indication from a position corresponding to a time when a direction indicator starts blinking to the starting position of the lane change on the display device with the displayed lane mark, the lane keeping guide indication indicating to stay in the traveling lane.