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Washington State Route 23
State Route 23 (SR 23) is a long state highway traversing Whitman and Lincoln counties in the U.S. state of Washington. The highway extends northwest from (US 195) in Steptoe through Sprague to an intersection with in Harrington. It serves as a route from and in Sprague towards Pullman via US 195, and has a longer child route, that travels north from SR 23 near Sprague to Reardan and Chewelah.
SR 23 was formally established in 1964 using roadways that have existed since 1937 as Secondary State Highway 11F (SSF 11C) from Sprague to Harrington and Secondary State Highway 11C (SSH 11C) from Steptoe to Sprague. SSH 11C was removed from Steptoe to Ewan in 1943 and became an extension of Primary State Highway 18 (PSH 18) and was completely designated as PSH 18 in 1953 and removed from the highway system in 1961. A second child route, , is proposed to be built from Ritzville to Ewan, but has not been built.
==Route description==
State Route 23 (SR 23) originates as Cashup Avenue at an intersection with (US 195) in Steptoe, about north of Colfax. The road is 2-lanes and undivided as it travels west through mostly rural areas and becomes Front Street in Saint John. Leaving the town, the highway turns northwest following Pleasant Valley Creek, intersecting the proposed terminus of in Ewan and a road serving Lamont, passing several lakes, and leaving Whitman County. Afer entering Lincoln County, the highway crosses over Union Pacific and BNSF rail lines, then passes through Sprague. The highway serves as exit 245 on (I-90) and in a diamond interchange, and is the busiest point on the route with an annual average daily traffic of 1,300 vehicles in 2011. North of the interchange, splits off and travels north towards Reardan, being longer than SR 23.〔 The highway continues northwest into Harrington, intersecting Coal Creek Road serving Harrington High School and becoming Sherlock Street. The road crosses a BNSF rail line and turns north,〔 becoming 3rd Street until the route ends at .
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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