| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigation system and a navigation control program for allowing proper navigation even when there is no road name of a destination in passage guiding data on a branch point. SOLUTION: A case of branching off into a superhighway B via a connection road from a superhighway A is supposed. When there is no data for indicating the road name of the superhighway B being the destination, for example, a line number in the passage guiding data 2 on the branch point to the connection road from the superhighway A, the line number of the superhighway B is specified by using the passage guiding data 2 on the other branch point existing on the connection road. The specified line number of the superhighway B is used for guiding a passage by voice at the branch point to the connection road from the superhighway A. |
