Patent ID: 7590490
Filing Date: 2009-09-15
Classification: G01C

Abstract:
1. A method implemented on a navigation system installed on a vehicle to generate an alternate route for the vehicle to travel to a predetermined destination, the method comprising: receiving, by the navigation system, a detour distance; receiving, by the navigation system, a predetermined timeout value; determining, using a motion sensor installed on the vehicle, a velocity of the vehicle on which the navigation system is installed, while the vehicle is traveling along a primary route; determining whether the velocity of the vehicle has been below a predetermined vehicle motion threshold for a time period exceeding the predetermined timeout value; and generating, by the navigation system automatically, an alternate route to guide the vehicle to travel to the predetermined destination on a detour of the primary route in accordance with the detour distance, in response to a determination that the velocity of the vehicle on which the navigation system is installed has been below the predetermined vehicle motion threshold for a time period exceeding the predetermined timeout value.