Patent ID: 8761455

Claim:
A road estimation device configured to receive data including a core point from an external object, the core point being assigned along a road and being assigned with an attribute for identifying the road, the road estimation device further configured to extract a link pertinent to the road represented by the core point for estimating the road on a map, the road estimation device comprising: a map data input device configured to input map data including links each having an attribute corresponding to the attribute of the core point; and a processor cooperatively operable with the map data input device, and configured to in a search region set unit, set a search region by using the core point as a reference point; in a link extraction unit, extract a link included in the search region from the links of the map data which the map data input device inputs; and in a road estimation unit, estimate the road represented by the core point according to an attribute of the link extracted by the link extraction unit and the attribute of the core point, wherein the core point is transmitted with traffic information including traffic congestion information.