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A desire path (also known as a desire line, social trail, cow path, goat track, pig trail or bootleg trail) can be a path created as a consequence of erosion caused by human or animal foot-fall or traffic. The path usually represents the shortest or most easily navigated route between an origin and destination. Width and erosion severity can be indicators of how much traffic a path receives. Desire paths emerge as shortcuts where constructed ways take a circuitous route, have gaps, or are non-existent. ==Parks and nature areas== Desire paths sometimes cut through sensitive habitats and off-limit areas, threatening wildlife and park security. However, they also provide an indicator to park management of activity concentration. The National Park Service unit at the Yosemite National Park in the United States of America uses this indicator to help establish its General Management Plan. Trampling studies have consistently documented that impacts on soil and vegetation occur rapidly with initial use of desire paths. As few as 15 passages over a site can be enough to create a distinct trail, the existence of which then attracts further use. This finding contributed to the creation of the Leave No Trace education program, which, among other things, teaches that travelers in nature areas should either stay on designated trails or, when off trail, distribute their travel lines so as to not inadvertently create new trails in unsustainable locations. Land managers have devised a variety of techniques to block the creation of desire paths including fences, dense vegetation, or signage. However, hikers still penetrate these barriers. Because of this, state of the art trail design attempts to avoid the need for barriers and restrictions and instead seeks to bring trail layout and user desires in line with each other - both through physical design and through persuasive outreach to users. In Finland, planners are known to visit their parks immediately after the first snowfall, when the existing paths are not visible. People naturally choose desire paths, clearly marked by their footprints, which can be then used to guide the routing of new purpose-built paths. 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「Desire path」の詳細全文を読む スポンサード リンク
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