Drive state indicator for an autonomous vehicle

1. A system for indicating the drive state of an autonomous vehicle, the system comprising:

a human machine interface; and

an electronic controller, electrically coupled to the human machine interface and configured to

display, via the human machine interface, a drive state indicator, the drive state indicator including

a mode indicator based on a current operating mode for the autonomous vehicle, the current operating mode being one selected from a group consisting of an autonomous driving mode and a manual driving mode;

a duration indicator based on a duration for the current operating mode;

a descriptor based on the duration;

update the duration indicator and the descriptor based on a remainder of the duration;

determine, while in the current operating mode, whether a second operating mode is available; and

when the second operating mode is available, display, while in the current operating mode, a second mode indicator within the drive state indicator, the second mode indicator based on the second operating mode and indicating that the second operating mode is available.

2. The system of claim 1 , wherein the mode indicator includes a solid letter.

3. The system of claim 1 , wherein the duration indicator includes a circular progress bar surrounding the mode indicator.

4. The system of claim 1 , wherein the descriptor includes at least one text-based message.

5. The system of claim 1 , wherein the second operating mode is one selected from a group consisting of an autonomous driving mode and a manual driving mode.

6. The system of claim 1 , wherein the second mode indicator includes an outlined letter.

7. The system of claim 1 , wherein the second mode indicator includes a solid letter and an outlined letter.

8. The system of claim 1 , wherein the electronic controller is further configured to

receive a signal from the human machine interface indicating a request to activate the second operating mode;

activate the second operating mode in response to the request;

display a second mode indicator based on the second operating mode;

display a second duration indicator based on a second duration for the second operating mode;

display a second descriptor based on the second duration; and

update the second duration indicator and the descriptor based on a second remainder of the second duration.

9. The system of claim 1 , wherein the electronic controller is further configured to

display the second mode indicator, a second duration indicator, and a second descriptor when the remainder meets a threshold.

10. The system of claim 9 , wherein the second duration indicator includes a plurality of hash marks denoting the remainder; and

wherein the electronic controller is further configured to update the second duration indicator based on the remainder.

11. A method for operating an autonomous vehicle, the method comprising:

displaying, via a human machine interface of the autonomous vehicle, a mode indicator based on a current operating mode for the autonomous vehicle, the current operating mode being one selected from a group consisting of an autonomous driving mode and a manual driving mode;

displaying, via the human machine interface, a duration indicator based on a duration for the current operating mode;

displaying, via the human machine interface, a descriptor based on the duration;

updating, by an electronic controller of the autonomous vehicle, the duration indicator and the descriptor based on a remainder of the duration;

determining, by the electronic controller, while in the current operating mode, whether a second operating mode is available; and

displaying, via the human machine interface, while in the current operating mode, a second mode indicator within the drive state indicator, the second mode indicator based on the second operating mode and indicating that the second operating mode is available within the drive state indicator.

12. The method of claim 11 , wherein displaying the second mode indicator includes displaying the second mode indicator based on one selected from a group consisting of an autonomous driving mode and a manual driving mode.

13. The method of claim 11 , further comprising:

receiving, by the electronic controller, a signal from the human machine interface indicating a request to activate the second operating mode;

activating, by the electronic controller, the second operating mode in response to the request;

displaying, via the human machine interface, the second mode indicator based on the second operating mode;

displaying, via the human machine interface, a second duration indicator based on a second duration for the second operating mode;

displaying, via the human machine interface, a second descriptor based on the second duration; and

updating, by the electronic controller, the second duration indicator and the descriptor based on a second remainder of the second duration.

14. The method of claim 11 , further comprising:

displaying, via the human machine interface, the second mode indicator, a second duration indicator, and a second descriptor when the remainder meets a threshold.

15. The method of claim 11 , further comprising:

updating, by the electronic controller, the second duration based on a the remainder; and

wherein displaying the second duration indicator includes displaying the second duration indicator with a plurality of hash marks denoting the remainder.