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State Route 8 (SR 8) is a state highway in Grays Harbor and Thurston counties, of the U.S. state of Washington. It extends from U.S. Route 12 (US 12) in the city of Elma, east to an interchange with US 101 about northwest of the state capital, Olympia. SR 8 intersects SR 108 west of McCleary. The route connects Elma and Olympia as part of a corridor between Aberdeen and the Puget Sound region. The highway formerly was part of the Elma – Grand Mound branch of Primary State Highway 9 (PSH 9 EG) from 1937 until 1964, which ran from Elma southeast to Interstate 5 (I-5), formerly US 99 in Grand Mound, which was later added as part of US 12 in 1967. The road also forms the northern boundary of Capitol State Forest in Thurston County. ==Route description== SR 8 runs east from US 12 in Elma to an interchange with US 101 northwest of Olympia.〔 The route links the city of Elma with Olympia, and intersects only one other highway, SR 108, in McCleary. WSDOT has found that more than 17,000 motorists utilize the road daily at the interchange with US 101 based on average annual daily traffic (AADT) data. SR 8 starts at an interchange with US 12 in Elma. From the interchange, the expressway goes northeast past Downtown Elma and starts to parallel the Chehalis River. After crossing the river twice, the highway intersects SR 108, which goes northeast towards Kamilche, west of McCleary. After passing Downtown McCleary, SR 8 has a partial cloverleaf interchange with Mox Chehalis Road. From the interchange, the expressway goes east to form the northern boundary of the Capitol State Forest, and passes Summit Lake. From Summit Lake, the highway turns northeast and merges with US 101 southbound.〔 The entire length of SR 8 is expressway. When combined with US 12 to the west and US 101 to the east, it serves as the primary connection between the Puget Sound region and Washington's Pacific coast. 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「Washington State Route 8」の詳細全文を読む スポンサード リンク
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