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・ "Our Contemporary" regional art exhibition (Leningrad, 1975)
・ "P" Is for Peril
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・ ! (disambiguation)
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・ !!Destroy-Oh-Boy!!
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・ !Hero
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・ !T.O.O.H.!
・ !Women Art Revolution


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Oregon State Highway System : ウィキペディア英語版
State highways in Oregon

The state highway system of the U.S. state of Oregon is a network of highways that are owned and maintained by the Highway Division of the Oregon Department of Transportation (ODOT).
==Highways and routes==

The state highway system consists of about 8,000 miles (13,000 km) of state highways (roadways owned and maintained by ODOT), with about 7,400 miles (12,000 km) when minor connections and frontage roads are removed. This is about 9% of the total road mileage in the state, including Oregon's portion of the Interstate Highway System (729.57 mi/1,174.13 km) and many other highways ranging from statewide to local importance.〔Oregon Department of Transportation, (2006 Oregon Mileage Report ), July 2007〕 Transfers of highways between the state and county or local maintenance require the approval of the Oregon Transportation Commission (OTC), a five-member governor-appointed authority that meets monthly.〔Oregon Department of Transportation, (Oregon Transportation Commission ), accessed September 2007〕 These transfers often result in discontinuous highways, where a local government maintains part or all of a main road within its boundaries.〔Oregon Department of Transportation, (Transferring Roads: Handbook for Making Jurisdictional Transfers ), accessed September 2007〕
Two separate numbering systems are used; routes (e.g. ) are those used by the general public, and their shields are posted on guide signs and maps. These comprise the Interstate highways, U.S. Routes, and Oregon Routes (eg. OR 201, listed in this article as for clarity). Highways, on the other hand, are used internally by ODOT; they are named and numbered (e.g. Pacific Highway No. 1, Willamette Highway No. 18). The two systems, while largely overlapping, are not congruent; many ''routes'' are signed on streets which are maintained by counties and cities, and thus are not part of the state ''highway'' system at all (cf. , whose eastern- and westernmost portions, Canyon Road and Gales Creek Road, are not actually state highways). On the other hand, some state ''highways'' are not signed as ''routes'' at all (cf. , which has an official route designation but remains entirely unsigned). Signed routes may comprise several highways; for instance, is overlaid on Mist-Clatskanie Hwy No. 110, Nehalem Hwy No. 102, and Tualatin Valley Highway No. 29. Likewise, highways may consist of several routes; the aforementioned Tualatin Valley Hwy No. 29 comprises parts of and . Every highway is fully state-maintained, and every route is at least partially state-maintained.〔〔
The OTC designates the paths of these routes as they follow state highways and local roads;〔Oregon Department of Transportation, (Descriptions of US and OR Routes ), July 2007〕 any U.S. Route or Interstate numbers must also be approved by the American Association of State Highway and Transportation Officials (AASHTO). Route signs are maintained by the same agency as the roads they are posted along. If a local government maintains a numbered route, it signs an agreement with the state to keep the signs posted, thus keeping a continuous route for the benefit of travelers.

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「State highways in Oregon」の詳細全文を読む



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