| 摘要 |
A road information providing apparatus includes a position detection unit, a matching unit, a reference point ranking unit, a calculation unit, a weighting unit, and a transmit unit. The position detection unit detects a present position of a vehicle. The matching unit specifies reference points based on the present position and map data. The reference point ranking unit defines a ranking of each reference point. The calculation unit calculates a priority value of each forward road link corresponding to one of the reference points. The weighting unit recalculates a weighted priority value of each forward road link based on the priority value of corresponding forward road link and the ranking of corresponding reference point. The transmit unit transmits the weighted priority value of each forward road link in order of increasing weighted priority value to an in-vehicle device.
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