User interface for predictive traffic

Abstract

A navigation device includes a predictive traffic data database to store predictive traffic data at a plurality of times and a map database to store mapping data. A mapping module calculates a route and an estimated time of traversal for a route between a beginning geographic location and an ending geographic location based on the predictive traffic data and the mapping data. A start time modification module monitors for a modification of a start time for the route, with the mapping module re-calculating the estimated time of traversal in response to the modification of the start time for the route.

What is claimed is: 
     
         1 . A method of determining a time to embark on an overall day's route determined by a navigation device, comprising:
 determining said overall day's route including each of a plurality of separate trips to different ending locations, each of said plurality of separate trips being separated in time over a day;   determining an estimated total travel time of traversal for said overall day's route between a beginning geographic location of a first one of said plurality of separate trips, and an ending geographic location of a last one of said plurality of separate trips, based on prior real time sampling of traffic patterns over an extended period of time, and a future start time for embarking on said overall day's route;   modifying said future start time for embarking on said overall day's route; and re-determining said estimated total travel time of traversal in response to said modification of said future start time.