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Washington State Route 506 : ウィキペディア英語版 | Washington State Route 506
State Route 506 (SR 506) is an long state highway in Cowlitz and Lewis counties, part of the U.S. state of Washington, serving the communities of Ryderwood and Vader. SR 506 begins at the intersection of 2nd and Morse Street in Ryderwood, a community in Cowlitz County, traveling north into Lewis County and turning east past Vader to parallel the Cowlitz River and interchange (I-5) twice west of Toledo. Originating as Secondary State Highway 1P (SSH 1P) in 1937, the highway was designated in its current form in 1964 and it shared its eastern terminus with . terminated at Vader and both SR 411 and SR 505 were moved away from SR 506 in 1991. ==Route description==
SR 506 begins as the continuation of Morse Street at the Second Street intersection in Ryderwood, a community located in the Campbell Creek valley in northern Cowlitz County. Traveling north to exit Ryderwood, the highway crosses Campbell Creek and enters Lewis County.〔 The roadway parallels Stillwater Creek in its valley northeast and turns east to cross the creek into Vader. The street is named 7th Street after crossing Olequa Creek;〔 SR 506 crosses a railroad track owned by BNSF Railway and used by two Amtrak services, the ''Cascades'' and ''Coast Starlight'', between the Kelso and Centralia stations. Traveling east through Vader, 7th Street intersects the West Side Highway, formerly until 1991, and leaves the city heading northeast, paralleling the Cowlitz River, to cross Lacamas Creek, the busiest segment of the highway at a daily average of 1,800 vehicles in 2008. The roadway crosses Bear Creek near its confluence with the Cowlitz River and interchanges (I-5) southbound exit 59; the route turns north to interchange I-5 again at exit 60 in a full diamond interchange. Exit 60 is also the western terminus of the Toledo-Vader Road, formerly until 1991.〔〔
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 506」の詳細全文を読む
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