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U.S. Route 2 (US 2) is a component of the United States Numbered Highway System that connects the city of Everett in the U.S. state of Washington to the Upper Peninsula of Michigan, with a separate segment that runs from Rouses Point, New York, to Houlton, Maine. Within Washington, the highway travels on a route that connects the western and eastern regions of the state as a part of the state highway system and the National Highway System. US 2 forms parts of two National Scenic Byways, the Stevens Pass Greenway from Monroe to Cashmere and the Coulee Corridor Scenic Byway near Coulee City, and an All-American Road named the International Selkirk Loop within Newport. US 2 begins in Everett at an intersection with State Route 529 (SR 529) in Everett and travels east to an interchange with Interstate 5 (I-5). The highway travels over the Cascade Range through Stevens Pass, connecting the western and eastern parts of the state. US 2 becomes concurrent with US 97 from Peshastin to Orondo, crossing the Columbia River in Wenatchee on the Richard Odabashian Bridge. The highway continues east across the Columbia Plateau in Central Washington and crosses the Grand Coulee while concurrent with SR 17 west of Coulee City. The highway travels into Spokane concurrent with I-90 and US 395 and leaves both highways continuing northeast to Newport. US 2 leaves Washington at the Idaho state line, located along SR 41 in Newport and Idaho State Highway 41 (ID-41) in Oldtown, Idaho. The present route of US 2 follows several wagon roads that were built in the late 19th century by local railroad companies, including the Stevens Pass Highway along the Skykomish River. The state of Washington began maintaining sections of what would become US 2 with the extension of State Road 7 in 1909, from Pashastin to Spokane on the Sunset Highway and later State Road 2. In addition to State Road 2, State Road 23 was created in 1915, traveling north from Spokane to Newport, and was renumbered to State Road 6 in 1923. The Stevens Pass Highway was transferred to state maintenance in 1931 with the establishment of State Road 15, traveling from Everett to Peshastin. The United States Highway System was adopted on November 11, 1926, and designated US 10 on the future route of US 2 from Peshastin to Spokane and US 195 from Spokane to Newport. US 10 was re-routed in 1939 and replaced by US 10 Alternate, which was routed across Stevens Pass in the 1940s and itself replaced by US 2 in 1946. The primary state highways were replaced by the current state route system during the 1964 state highway renumbering, and US 2 replaced its three concurrent routes. US 2 underwent conversions to limited-access highways during the next several decades, including the completion of the Hewitt Avenue Trestle and a bypass of Snohomish. A series of projects is planned to improve the US 2 corridor between Snohomish and Skykomish by expanding the highway near various cities and the completion of a bypass around Monroe in the near future. ==Route description== US 2 is defined by the Washington State Legislature as SR 2, part of the Revised Code of Washington as §(47.17.005 ). Every year, WSDOT conducts a series of surveys on its highways in the state to measure traffic volume. This is expressed in terms of annual average daily traffic (AADT), which is a measure of traffic volume for any average day of the year. In 2013, WSDOT calculated that the busiest section of US 2 within Washington was the Hewitt Avenue Trestle above the Snohomish River east of Everett, carrying over 76,000 vehicles, while the least busiest section of US 2 is in Moses Coulee, carrying 630 vehicles. The entire route of US 2 within Washington is designated as part of the National Highway System, classifying it as important to the national economy, defense, and mobility. WSDOT designates US 2 as a Highway of Statewide Significance, which includes highways that connect major communities in the state of Washington. US 2 begins in downtown Everett, with its eastbound lanes starting at the intersection of Hewitt Avenue and Maple Street, signed as SR 529, and its westbound lanes ending at the intersection of California Street and Maple Street (SR 529). The highway travels east onto the Hewitt Avenue Trestle, crossing the Snohomish River after an interchange with I-5. The four-lane trestle continues east across Ebey Island, intersecting Homeacres Road before crossing the Ebey Slough. US 2 turns southeast at the east end of the trestle in Cavalero at an interchange with SR 204, which serves Lake Stevens. The limited-access road travels around the city of Snohomish, intersecting Bickford Avenue in an at-grade intersection and SR 9 in a diamond interchange. US 2 turns south and crosses over the Pilchuck River and the Centennial Trail before its limited-access road ends at a diamond interchange with 88th Street. The two-lane road continues southeast along the Scenic Subdivision of the Northern Transcon, a BNSF rail line, into Monroe. The highway travels past the Evergreen State Fairgrounds and intersects SR 522 before entering downtown Monroe. US 2, now part of a National Scenic Byway named the Stevens Pass Greenway, continues through the city of Monroe and forms the northern terminus of SR 203. The highway leaves the city while parallel to the Skykomish River and travels through the cities of Sultan and Gold Bar. US 2 begins following the South Fork Skykomish River at Index into the Cascade Range, crossing into King County near the town of Baring. The highway enters Mount Baker-Snoqualmie National Forest and continues east along the Tye River past the town of Skykomish and the Cascade Tunnel towards Stevens Pass. The pass, located above sea level, is also home to the Stevens Pass Ski Area and a trailhead for the Pacific Crest Trail while serving as the point in which US 2 crosses into the Wenatchee National Forest in Chelan County. The highway continues east down Nason Creek to Coles Corner, the southern terminus of SR 207, which serves Lake Wenatchee. US 2 travels due south along the Wenatchee River valley through Leavenworth before it begins a concurrency with US 97 at a diamond interchange east of Peshastin.〔〔 US 2 and US 97 travel together on a four-lane highway on the north side of the Wenatchee River heading southeast past Cashmere heading towards Wenatchee. The roadway intersects SR 285, a short connector to downtown Wenatchee, and US 97 Alternate, an alternate route to Chelan, in Sunnyslope before crossing the Richard Odabashian Bridge over the Columbia River and into Douglas County. The two highways continue east into East Wenatchee and turn north at the western terminus of SR 28. US 2 and US 97 continue north between the Columbia River to the west and Badger Mountain to the east, passing the Rocky Reach Dam and its reservoir, Lake Entiat before reaching Orondo. US 2 and US 97 split at Orondo, with US 97 continuing north along the Columbia River towards Chelan and US 2 traveling east up Pine Canyon onto the Waterville Plateau. The highway travels through the town of Waterville via several turns on city streets before heading due east across the Columbia Plateau, intersecting SR 172 at Farmer. US 2 becomes concurrent with SR 17 as it descends into the Grand Coulee south of Banks Lake, becoming part of the Coulee Corridor Scenic Byway.〔〔 The byway travels off US 2 and onto SR 155 east of Coulee City at Fordair, continuing north through Grant County towards the Grand Coulee Dam. US 2 travels east into Lincoln County between the towns of Hartline and Almira and becomes concurrent with SR 21 in Wilbur for several city blocks. The highway parallels the Columbia River Subdivision of the BNSF Northern Transcon through Bachelor Prairie towards Davenport,〔〔 where it intersects the termini of SR 28 and SR 25. US 2 travels into Reardan concurrent with SR 231 and enters Spokane County east of the town boundary. The highway passes Fairchild Air Force Base and becomes a four-lane arterial street through Airway Heights approaching Spokane. US 2 enters the city of Spokane as a four-lane freeway northeast of Spokane International Airport and intersects Airport Way before beginning its concurrency with I-90 and US 395 at a partial cloverleaf interchange.〔〔 I-90, US 2 and US 395 travel east into Downtown Spokane and intersects the northern terminus of US 195, which travels south towards Pullman and Lewiston, Idaho. US 2 and US 395 split from I-90 and travel into Downtown Spokane on the one-way pair of Browne and Division streets, serving the Spokane Intermodal Center and Spokane Convention Center before reaching Riverfront Park. Division Street crosses the Spokane River and the Centennial Trail on the Senator Sam C. Guess Memorial Bridge before splitting into the one-way pairing of Division and Ruby streets. Division Street continues north past the NorthTown Mall and the eastern terminus of SR 291 at Francis Street before US 2 and US 395 split.〔〔 US 2 travels northeast through Country Homes on the Newport Highway to an interchange with the North Spokane Corridor, an incomplete freeway bypass of Spokane that is signed as a spur route of US 395. The highway continues west of Mead and intersects SR 206, a road serving Mount Spokane State Park, before becoming a four-lane divided highway parallel the Kooteani River Subdivision of the BNSF Northern Transcon. US 2 travels north along the Little Spokane River through Colbert and Chattaroy before leaving Spokane County and entering Pend Oreille County. The divided highway ends at the southern terminus of SR 211, located west of Diamond Lake. US 2 continues northeast along the Little Spokane River and enters the city of Newport, splitting into a one-way pair on Washington and Union avenues. The two streets travel north through the city to the eastern terminus of SR 20 and turn east onto Walnut Street and the International Selkirk Loop, where US 2 crosses the Idaho state line at the northern terminus of SR 41 in Newport and ID-41 in Oldtown, Idaho.〔〔 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「U.S. Route 2 in Washington」の詳細全文を読む スポンサード リンク
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