Patent Document ID: 9568327
Application ID: 14417998
Patent Status: 1

Claim One:
1. A navigation system comprising: a GPS module; an image recognition module having a line recognition function; a roadmap storage module configured to store roadmap information and route change possible section information through which a route of a vehicle is changed; a roadmap receiving module configured to receive the roadmap information; and an arithmetic processing module configured to determine whether the route of the vehicle is changed, based on the route change possible section information and line recognition information recognized by the image recognition module, wherein the roadmap information stored in the roadmap storage module comprises line characteristic information, and wherein when determining that a route change is dangerous because a number of lanes which are to be changed from a current lane of the vehicle is large in comparison to a remaining forward distance to a route change impossible section from the vehicle, the arithmetic processing module cancels a current route guide function and searches for a next route.