| http://www.w3.org/ns/prov#value | - The road shape detecting means is not limited to the navigation system NV and may be a photographing means such as a CCD camera for detecting a situation in a direction of movement of the vehicle, e.g., a white line, a vehicle traveling ahead of the vehicle, a guardrail and the like, or a communication means such as a beacon placed on the road for transmitting road information to the vehicle.
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