| 摘要 |
An on-vehicle apparatus detects at least one of right and left edges of a road on and along which a vehicle travels. In the apparatus, acquired is information indicative of a plurality of detection points which are given as a plurality of candidates for the edges of the road viewed forward from the vehicle. Further acquired is information indicative of behaviors of the vehicle. A calculating member calculates, based on the acquired information, every detection point, a plurality of passing positions each indicating a position of each of the detection points to a position of the vehicle provided that the vehicle travels to a position on the road which is located right beside each of the detection points. A road edge obtaining member obtains the edges of the road based on the plurality of passing positions calculated.
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