Route Search Device and Route Search Method
First Claim
1. A route search device comprising:
- a storage medium for storing traffic information classified by weather conditions;
a pointing device which sets a starting point and a destination; and
a guide route search module that searches for a route smallest in the amount of variation in required travel time depending on weather conditions from the starting point to the destination as a guide route by using traffic information stored in the storage medium.
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Accused Products
Abstract
A route to a destination in which required travel time barely varies depending on weather is searched for without referring to weather forecast or weather information. A route search device comprises following means: a storage medium for storing traffic information including travel times by weather conditions for each link comprising a road on a map; a pointing device which sets a starting point and a destination; a weather condition-based route search module that determines the shortest travel time route from the starting point to the destination by weather conditions using the traffic information stored in the storage medium; a link series-identifying module that extracts link series which vary with weather conditions from link series comprising the shortest travel time route determined by the weather condition-based route search module, determines the required travel time by weather conditions for the each link series that vary with weather conditions by using the traffic information stored in the storage medium, and identifies a link series whose required travel time barely varies depending on weather conditions; and a link series-registering medium that registers the link series identified by the link series-identifying module as a link series comprising a guide route from the starting point to the destination.
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Citations
12 Claims
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1. A route search device comprising:
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a storage medium for storing traffic information classified by weather conditions; a pointing device which sets a starting point and a destination; and a guide route search module that searches for a route smallest in the amount of variation in required travel time depending on weather conditions from the starting point to the destination as a guide route by using traffic information stored in the storage medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A route search method for a route search device,
including a storage medium for storing traffic information classified by weather conditions, wherein the route search device carries out: -
a step of setting a starting point and a destination; and a guide route search step of searching for a route smallest in the amount of variation in required travel time depending on weather conditions from the starting point to the destination using traffic information stored in the storage medium as a guide route. - View Dependent Claims (12)
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Specification