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A ''route nationale'', or simply ''nationale'', is a trunk road in France. Trunk roads in France are important roads which cross broad portions of the French territory, as opposed to secondary or communal roads who only serve local areas. Their use is free, except when crossing certain structures subjected to toll. They are open to all vehicles, except on certain sections having the status of motorway (''autoroute''). France currently has 30,500 km of nationales and publicly owned motorways. By comparison, routes départementales cover a total distance of 365,000 km. The main trunk road network reflects the centralising tradition of France: the majority of them leave the gates of Paris. Indeed, trunk roads begin on the parvis of Notre-Dame of Paris at Kilometre Zero. To ensure an effective road network, new roads not serving Paris were created. ==History== The system dates back to December 16, 1811, when Napoleon designated a number of ''routes impériales'' (imperial highways). First class routes were numbered from 1 to 14; all began at Paris, radiating out in a clockwise manner. Route 1 ran from Paris north to Calais, and is still the general path of route nationale 1. Second class routes, from 15 to 27, did the same, while third class routes from 28 to 229 provided less major connections. During the Bourbon Restoration, in 1824, these routes were renamed ''routes royales'' (royal highways) and modified. Route 3, Paris to Hamburg via Soissons, Reims and Liège, was renumbered to 31 and 51, and the subsequent routes were shifted down by one. Routes 19 and 20 were completely outside the post-Napoleon France, and so 21 to 27 became 18 to 24. In 1830 the highways were renamed ''routes nationales''.〔(Note Sommaire sur la Gestion des Routes )〕 In 2006 the French Government downgraded a number of the routes nationales to departmental status. 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「Route nationale」の詳細全文を読む スポンサード リンク
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