Route selection based on automatic-manual driving preference ratio

1. A navigation system for a vehicle equipped with an autonomous driving system, the navigation system comprising:

a human-machine interface including a display and a user control; and

an electronic controller communicative coupled to the human-machine interface and configured to

calculate a plurality of travel routes from a determined starting point to a defined destination point;

determine which portions of each travel route will utilize automated driving operation and which portions will utilize manual driving operation;

define, based on an input from the user control, an automatic-manual driving preference ratio indicating a driver preference for an amount of manual driving operation relative to an amount of automatic driving operation;

automatically select a route from the plurality of travel routes that most closely matches the defined automatic-manual driving preference ratio; and

output the selected route on the display.

2. The navigation system of claim 1 , wherein the human-machine interface includes a touch-screen display and wherein the electronic controller is further configured to display an adjustable user control on the touch-screen display and to define the automatic-manual driving preference ratio based on a positioning of the adjustable user control on the touch-screen display.

3. The navigation system of claim 2 , wherein the electronic controller is further configured to

detect a change in the positioning of the adjustable user control,

define an updated automatic-manual driving preference ratio based on the change in the positioning of the adjustable user control,

select an updated route from the plurality of routes that most closely matches the updated automatic-manual driving ratio, and

output the updated route on the display.

4. The navigation system of claim 3 , wherein the electronic controller is configured to output the selected route on the display by displaying an indication of a time and a distance of automatic driving operation in the selected route and a time and a distance of manual driving operation in the selected route, and wherein the electronic controller is configured to output the updated route on the display by displaying an indication of a time and a distance of automatic driving operation in the updated route and a time and distance of manual driving operation in the updated route.

5. The navigation system of claim 2 , wherein the adjustable user control includes a slider bar control and wherein the automatic-manual driving preference ratio is defined based on a relative positioning of the slider bar control.

6. The navigation system of claim 1 , wherein the electronic controller is configured to output the selected route on the display by displaying a map of the selected route on the display, the displayed map including a visual indication of the portions of the route that will utilized automated driving operation and a visual indication of the portions of the route that will utilize manual driving operation.

7. A method for defining a travel route for a vehicle including an autonomous driving system, the travel route including at least a portion of the travel route for automatic driving operation, the method comprising:

calculating a plurality of travel routes from a determined starting point to a defined destination point;

determining which portions of each travel route will utilize automated driving operation and which portions will utilize manual driving operation;

defining, based on an input from the user control, an automatic-manual driving preference ratio indicating a driver preference for an amount of manual driving operation relative to an amount of automatic driving operation;

automatically selecting a route from the plurality of travel routes that most closely matches the defined automatic-manual driving preference ratio; and

outputting the selected route on the display.

8. The method of claim 7 , further comprising displaying an adjustable user control on a touch-screen display and defining the automatic-manual driving preference ratio based on a positioning of the adjustable user control on the touch-screen display.

9. The method of claim 8 , further comprising:

detecting a change in the positioning of the adjustable user control,

defining an updated automatic-manual driving preference ratio based on the change in the positioning of the adjustable user control,

selecting an updated route from the plurality of routes that most closely matches the updated automatic-manual driving ratio, and

outputting the updated route on the display.

10. The method of claim 9 , wherein outputting the selected route on the display includes displaying an indication of a time and a distance of automatic driving operation in the selected route and a time and a distance of manual driving operation in the selected route, and wherein outputting the updated route on the display includes displaying an indication of a time and a distance of automatic driving operation in the updated route and a time and distance of manual driving operation in the updated route.

11. The method of claim 8 , wherein the adjustable user control includes a slider bar control and wherein the automatic-manual driving preference ratio is defined based on a relative positioning of the slider bar control.

12. The method of claim 7 , wherein outputting the selected route on the display includes displaying a map of the selected route on the display, the displayed map including a visual indication of the portions of the route that will utilized automated driving operation and a visual indication of the portions of the route that will utilize manual driving operation.