Navigation device
First Claim
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1. A navigation device, comprising:
- a storage means for storing link data including cost of respective lanes of links constituting a road on a map; and
a route search means for searching for a route having a lowest total cost to a destination, using said link data.
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Abstract
Route search is performed considering the fact that traffic conditions differ according to lane even for the same road. A navigation device performs route search, using link costs (link travel times) classified by lane. For example, the navigation device searches for a route having the lowest total cost to the destination, using link data that determine cost for each lane of a component link of a road on a map. A cost of a lane on which a vehicle runs to move to a next link, being the cost of any lane of the link, is used as a cost of a link on a route.
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Citations
7 Claims
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1. A navigation device, comprising:
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a storage means for storing link data including cost of respective lanes of links constituting a road on a map; and
a route search means for searching for a route having a lowest total cost to a destination, using said link data. - View Dependent Claims (2, 3, 7)
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4. A navigation device, wherein said navigation device comprises:
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a means for storing link data including cost of respective lanes of links constituting a road on a map, said costs being statistically processed based on traffic information collected in the past and classified according to a collection condition; and
a route search means for searching for a route having a lowest total cost to a destination, using said link data;
whereinsaid route search means uses, as a cost of a link that a route comprises, a cost of a lane on which a vehicle runs to move to a link next to the link in question, being the cost classified according to a collection condition corresponding to a situation at a time of arrival at the link in question. - View Dependent Claims (5)
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6. A navigation device comprising:
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a means for storing link data including travel times of respective lanes of links constituting a road on a map;
a route search means for searching for a route to a destination; and
a travel time calculation means for calculating total travel time to said destination, by adding travel time of respective links constituting a route to said destination;
whereinsaid travel time calculation means uses, as a travel time of a link that a route comprises, a travel time of a lane on which a vehicle runs to move to a next link, being the travel time of one of lanes of the link in question.
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Specification