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roadless area conservation
Roadless area conservation is a conservation policy limiting road construction and the resulting environmental impact on designated areas of public land. In the United States, roadless area conservation has centered on U.S. Forest Service areas known as inventoried roadless areas. The most significant effort to support the conservation of these efforts was the Forest Service 2001 Roadless Area Conservation Rule (Roadless Rule).
==Concept==
Access roads provide convenient access for industry as well as for a variety of recreational activities, such as sightseeing, fishing, hunting, and off-roading. However, these activities can cause erosion, pollution, species loss,〔(BLM restricts off-road travel on southern Utah badlands )〕 and loss of aesthetic appeal. In addition, the building of roads can lead to further development of "splinter roads" that take off from them, and the encroachment of human settlement and development in sensitive areas.
In the United States, roadless areas make up 58.5 million acres (237,000 km²), or about 30%, of National Forest lands in 38 states and Puerto Rico. These areas provide critical habitat for more than 1,600 threatened, endangered, or sensitive plant and animal species.〔(National Forest Roadless Areas ), The Wilderness Society (United States)〕 Roadless rules are also seen as a way to save taxpayers money. America’s National Forests are currently covered with of roads, enough to encircle the earth 15 times. A $4.5-billion maintenance backlog exists on National Forest roads, according to the agency's own estimates.〔USFS Budget Justification 2006〕
One example of roadless area conservation is Alaska's Denali National Park, which is prized for its expansive roadless area. There is but one access road into the park; only official vehicles are permitted after .〔(Denali National Park and Preserve Denali Park Road Open to Mile 30 ) nps.gov〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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