PROVIDING ALTERNATIVE ROAD NAVIGATION INSTRUCTIONS FOR DRIVERS ON UNFAMILIAR ROADS

摘要

Techniques for providing driving instructions for drivers on unfamiliar roads. A navigation system stores “breadcrumbs,” or indicators of road segments on which a particular vehicle has previously driven. The system detects whether a vehicle has turned off of a “familiar” road by examining these breadcrumbs. If the navigation system determines that the current position of the vehicle is associated with a road segment for which a number of breadcrumbs below a particular threshold are stored, then the navigation system determines that the vehicle is on an unfamiliar road. The navigation system identifies a secondary path and presents that path to the driver to return the driver to the familiar road. The secondary path may be identified in a manner that avoids obstacles by examining traffic information or distance information.

主权项

1. A method implemented via navigation software executing in a vehicle navigation system, the method comprising:
determining, while the navigation software is not providing navigation information to a driver of the vehicle, that the vehicle has turned from a first path that is deemed to be a known path onto a first road segment for which a first number of recorded position indicators is below a first threshold; determining a location along a first path at which to return the vehicle; identifying a second path that returns the vehicle to the first path at the location; and displaying driving instructions associated with the second path that returns the vehicle to the first path.