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Primitive road : ウィキペディア英語版 | Primitive road
A primitive road is a minor road system, used for travel or transportation that is generally not maintained or paved. ==Classification== A primitive road can be classified if it meets the following criteria: #Is not classified as part of the area's primary road system, #Has a gravel or earth driving surface; and #Has an average annual daily traffic of one hundred or fewer vehicles. In the United States most of these roads are maintained by local governments.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Primitive road」の詳細全文を読む
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