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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Keystone Markers ： ウィキペディア英語版 Keystone Markers A system of roadside signage developed by the Pennsylvania Department of Highways just after the First World War, the iconic Keystone Markers could be found at the entrance to every Pennsylvania town, borough and city. Variations of the marker could be found at highway crossings of creeks, rivers, trails, borough lines, and other points of interest. == Overview == The Keystone Markers were products of the height of the “Good Roads" movement that opened highway travel to the masses. The Keystone Markers were the signature project of the Department, the second oldest of its kind in the nation and predecessor to today's PennDOT. The proliferation of the familiar blue-and-yellow, cast iron Keystone Markers popularized Pennsylvania's reputation as the "Keystone State".〔 While Pennsylvania once claimed thousands of Keystone Markers, approximately 600 remain.〔 The loss of the Markers prompted Preservation Pennsylvania, the Commonwealth's statewide heritage preservation advocacy organization, to include the Keystone Markers among their most endangered resources in 2011.〔(【引用サイトリンク】publisher=Preservation Pennsylvania 2011 )〕 Keystone Markers associated with towns are the most common of the survivors. In each municipality where the markers were installed, at least two were put up, one on each end of town along the principal roadway. If a town was at the intersection of two such roadways, there were four signs installed, two on each road.〔 Markers for towns indicated the name of the town, the reason why the town was given that name, and the date founded. Many town Keystone Markers indicated the distance to the next town in the upper part of the sign. Thus, each marker for a given town was unique.〔 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「Keystone Markers」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.