Patent ID: 8131467
Filing Date: 2012-03-06
Classification: G01C

Abstract:
1. A route information display device comprising: a multiple destination input unit operable to accept input of a plurality of different destination and categories for each of the different destination; a route search unit configured to search for and set as a travel route, a route from a departure point to a first destination among the different destinations; a branch point candidate calculation unit configured to calculate, after the route is set by the route search unit, a plurality of branch point candidates located on the set route and including at least the first destination; a branch point route search unit configured to search for a plurality of branch points routes from each of the plurality of branch point candidates to a second destination that is other than the first destination among the different destinations; a destination category judgment unit configured to judge whether a category of the first destination and a category of the second destination are in a same category or a different category; a branch point selection unit configured to select, as branch point to the second destination, a branch point candidate other than the first destination when it is judged that the category of the first destination as the branch point to the second destination are the same category, and to select the first destination as the branch point to the second destination when it is judged that the category of the first destination and the category of the second destination are different categories; and a route information display unit configured to display a route to the first destination and a branch point route from the selected branch point candidate to the second destination, wherein the destination category judgment unit is configured to store information indicating a category and a general duration of stay at a destination belonging to the category, and the branch point selection unit is configured to select, as the branch point to the second destination, the branch point candidate that is other than the first destination, when an overtime is equal to or above a predetermined threshold, and to select the first destination as the branch point to the second destination when the overtime is below the predetermined threshold, the overtime being obtained by subtracting: (i) an amount of time required by a route that branches at the branch point candidate other than the first destination and leads to the second destination, from (ii) an amount of time obtained by adding the general duration of stay stored in the destination category judgment unit for the category of the first destination to an amount of time required by a route that leads to the second destination via the first destination.