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; characterized in that the human-machine interface is further configured to 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; output the selected route on the display; detect when the user has deviated from the selected route during manual operation and determine that the selected route no longer matches the defined automatic-manual driving preference ratio; and automatically recalculate and display a second route that most closely matches the automatic-manual driving preference ratio. 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; characterized in that the human-machine interface is further configured to 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; output the selected route on the display; detect when the user has deviated from the selected route during manual operation and determine that the selected route no longer matches the defined automatic-manual driving preference ratio; and automatically recalculate and display a second route that most closely matches the automatic-manual driving preference ratio. 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; characterized in that the human-machine interface is further configured to 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; output the selected route on the display; detect when the user has deviated from the selected route during manual operation and determine that the selected route no longer matches the defined automatic-manual driving preference ratio; and automatically recalculate and display a second route that most closely matches the automatic-manual driving preference ratio. <EOS>