A navigation system is described for a vehicle equipped with an autonomous driving system. The navigation system includes a human-machine interface with a display and a user control, and an electronic controller. The controller is configured to calculate a plurality of travel routes from a determined starting point to a defined destination point. The controller determines which portions of each travel route will utilized automated driving operation and which portions will utilized manual driving operation. Based on an input received from the user control, the controller defines 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. The controller automatically selects a route from the plurality of travel routes that most closely matches the defined automatic-manual driving preference ratio and outputs the selected route on the display.