| 摘要 |
An improved land vehicle navigation apparatus (10) and method for automatically planning a recovery route upon detection of a route departure. The land vehicle navigation apparatus (10) comprises a route planner (22) for planning an original route (88) for the land vehicle (2), via fixed road paths, wherein the original route includes multiple route segments, a start location, and at least one destination, including an original destination, and a position determiner (14) for determining an estimated current position of the land vehicle (2) and route storage for storing the original route segments into memory (24). The improvement comprises an automatic recovery route planner (56) for automatically planning a recovery route to the original route (88) upon detecting a route departure using recovery route planning criteria including designating at least some of the stored original route segments as a destination thereby eliminating the need for planning a completely new route and reducing recovery route planning time.
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