System and method for guiding a driver of a vehicle (20) from a starting
point to a destination point using an assignment of levels of urgency of
navigation cues. The system comprises a navigation unit (38), a
controller (22) and a user interface (42). The navigation unit (38) is
capable of selecting a route between the starting point and the
destination point. The navigation unit (38) is further capable of
generating a plurality of navigation cues to guide the driver along the
selected route. The controller (22) is connected to the navigation unit
(38) and receives navigation cues. The controller (22) has an urgency
calculator (40) that is capable of assigning a level of urgency to the
navigation cues. The controller (22) may also have a workload manager
(60) that is capable of classifying an activity state of the driver as
well as updating the level of urgency of the navigation cue. The user
interface (42) presents the navigation cues based on the level of urgency
of the navigation cues.