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List of Interstate and U.S. Highways in Washington

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Numbered highways in Washington

This map shows all current Interstates and U.S. Routes.
Interstates are in blue, and U.S. Routes are in red.
Concurrencies between Interstates and U.S. Routes
are not shown.
State highways in Washington
Lists: current - Interstates - U.S. Routes - 1937-70 - 1964 renumbering
Part of the series on
Highways in Washington
Interstates
U.S. routes
State highways
Former Primary State Highways

Three systems of numbered highways are present in the U.S. state of Washington: the Interstate Highway System, the U.S. Numbered Highways, and the Washington state route system. The Interstate Highway System and U.S. Highway System are nationwide systems with a subset of the highways passing through Washington. All numbered highways in Washington are maintained by the Washington State Department of Transportation, commonly known as WSDOT. There are currently 771.83 miles (1,242.14 km) of Interstate in Washington and 1,821.85 miles (2,931.98 km) of U.S. highways in Washington, which combines to make 2,593.68 miles (4,174.12 km) of numbered highways in Washington.[1][2]

WSDOT, established as the Washington State Highway Board and the Washington State Highways Department, created the first system of numbered roads in Washington in 1923, with the establishment of the State Road system. When the U.S. highway system was established in 1926, many U.S. highways were co-signed with the existing state roads.[3] Later in 1937, another system, the Primary state highways and Secondary state highways took effect and increased the number of state-maintained roads in Washington.[4] A new system, the current State Route system, took effect in 1964, shortly after the creation of the Interstate Highway System.[5][6]

The Interstate highway with the longest segment in Washington is I-90,[7] at 296.92 miles (477.85 km), and the Interstate highway with the shortest segment in Washington is I-705,[8] at 1.50 miles (2.41 km). The U.S. highway with the longest segment in Washington is U.S. Route 12,[9] at 430.80 miles (693.31 km), and the U.S. highway with the shortest segment in Washington is U.S. Route 197,[10] at 3.18 miles (5.12 km). The longest Washington state highway is Washington State Route 20,[11] at 436.12 miles (701.87 km), and the shortest Washington state highway is Washington State Route 433[12] at 0.94 miles (1.51 km).[1][13][2]

Several former U.S. highways previously existed in Washington: U.S. Route 10, U.S. Route 95, U.S. Route 99, U.S. Route 295, U.S. Route 410, and U.S. Route 830.[14]

Contents

[edit] Primary Interstate highways

Route number Length[1] Western / southern terminus[2] Eastern / northern terminus[2] Counties[2] Description[2] References
I-5 276.62 miles (445.18 km) I-5 at Oregon state line in Vancouver Hwy 99 at Canadian border in Blaine Clark, Cowlitz, Lewis, Thurston, Pierce, King, Snohomish County, Skagit, Whatcom I-5 starts on the Interstate Bridge over the Columbia River at the Oregon state line in Vancouver. Then, I-5 goes north through Western Washington to Seattle, where I-5 intersects I-90. From Seattle, I-5 goes north to Blaine where at the Peace Arch, I-5 enters Canada and becomes British Columbia Route 99, a tribute to U.S. Route 99, the former US route that traversed the current I-5's route. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]
I-82[notes 1] 132.57 miles (213.35 km) I-90/US 97 in Ellensburg[notes 2] I-82 at Oregon state line in Plymouth Kittitas, Yakima, Benton I-82 begins at an interchange with I-90 and travels concurrently with US 97 southwest to Yakima, where it starts its joins US 12 and splits from with US 97. Then, the route moves southwest to the Tri-Cities where I-82 intersects its I-182 and splits off of US 12 and joins US 395, before going over the Columbia River to Oregon. [30][31][32][33][34][35]
I-90 296.92 miles (477.85 km) SR 519 in Seattle I-90 at Idaho state line near Spokane King, Kittitas, Grant, Adams, Lincoln, Spokane I-90 starts in Seattle at an interchange with SR 519. Then, it intersects I-5 before going across Lake Washington and move east to Snoqualmie Pass and continue eastward to Spokane and leaving to Idaho. [7][36][37][38][39][40][41][42][43][44][45][46]

I-5 passing through the Downtown Seattle skyline at night.

The Homer M. Hadley Memorial Bridge and Lacey V. Murrow Memorial Bridge carrying I-90 across Lake Washington towards Mercer Island.

[edit] Auxiliary Interstate highways

Route number Length[1] Western / southern terminus[2] Eastern / northern terminus[2] Counties[2] Description[2] References
I-205 10.57 miles (17.01 km) I-205 at Oregon state line in Vancouver I-5 in Salmon Creek Clark I-205 starts on the Glenn L. Jackson Memorial Bridge over the Columbia River at the Oregon state line in Vancouver. From Vancouver, I-205 goes northwest to I-5 in Salmon Creek. [47][48][49][50][51]
I-405 30.30 miles (48.76 km) I-5 in Tukwila I-5/SR 525 in Lynnwood King, Snohomish I-405 starts at I-5 near the SeaTac International Airport in Tukwila. I-405 goes east to Renton, where it intersects with SR 167. Then, it goes north to Bellevue, where it intersects I-90 and SR 520 before going northwest to I-5 in Lynnwood. [52][53][54][55][56]
I-605 Unknown Unknown Unknown King, Snohomish I-605 is a proposed bypass to I-405 and I-5. [57][58][59]
I-705 1.50 miles (2.41 km) I-5/SR 7 in Tacoma Schuster Parkway in Tacoma Pierce I-705 begins at I-5/SR 7 and goes north to the Schuster Parkway. [8][60][61][62][25]
I-182 15.19 miles (24.45 km) I-82/US 12 near Richland US 12/US 395 in Pasco Benton, Franklin I-182 starts at I-82/US 12 near the Tri-Cities before joining US 12 and going east to Pasco, where the freeway ends at the US 395/US 12 interchange. [63][64][65][66][35]

I-205 on the Glenn L. Jackson Memorial Bridge over the Columbia River towards Vancouver

The eastern terminus of I-182 looking eastbound on US 12 towards Walla Walla.

[edit] Current U.S. highways

Route number Length[1] Western / southern terminus[2] Eastern / northern terminus[2] Counties[2] Description[2] References
US 101 365.55 miles (588.30 km) US 101 at Oregon state line near Megler I-5 near Tumwater Pacific, Grays Harbor, Jefferson, Clallam, Mason, Thurston US 101 starts on the Astoria-Megler Bridge and goes north to Megler. From Megler, US 101 goes north and loops around Ilwaco before continuing northward to Aberdeen. In Aberdeen, US 101 intersects US 12 and goes west and north to Beaver. In Beaver, US 101 goes east towards Port Angeles and Sequim. After going south at Discovery Bay, US 101 intersects SR 8 and ends at I-5. [67][68][69]
US 2 326.22 miles (525.00 km) SR 529 in Everett US-2 at Idaho state line in Newport Snohomish, King, Chelan, Douglas, Grant, Lincoln, Spokane US 2 starts at an intersection with SR 529 in Everett and goes east to I-5. From Everett, US 2 becomes a short freeway and goes east and passes Stevens Pass to enter Eastern Washington. From there, US 2 goes to Cashmere, where it joins US 97 and then continues east towards Spokane. In Spokane, US 2 joins I-90 and US 395 into Downtown, where US 2 and US 395 split from I-90 and US 2 splits from US 395. From Spokane, US 2 goes northeast to Newport and intersects SR 20 and SR 41 before entering Idaho. [70][71][72]
US 12 430.80 miles (693.31 km) US 101 in Aberdeen US-12 at Idaho state line in Clarkston Grays Harbor, Lewis, Yakima, Benton, Walla Walla, Columbia, Garfield, Asotin US 12 starts at an intersection with US 101 in Aberdeen. From there, US 12 continues east to Elma and southeast to Chehalis, where it joins I-5 and leaves in Napavine. US 12 then goes east across White Pass to Yakima, where it joins both US 97 and I-82. US 97 exits off south of Yakima and US 12 exits off of I-82 at the interchange with I-182, which US 12 follows until I-182 ends at US 395 in Pasco. From Pasco, US 12 goes east to Clarkston, where it enters Idaho. [9][73][74]
US 97 321.62 miles (517.60 km) US 97 at Oregon state line near Maryhill Hwy 97 at Canadian border near Orville Klicakitat, Yakima, Kittitas, Chelan, Douglas, Okanogan US 97 starts on the Sam Hill Memorial Bridge, which spans the Columbia River between Biggs Junction, Oregon (US 97 and US 30/I-84) and Maryhill (US 97 and SR 14). From there, US 97 goes north to join SR 14 before leaving towards Yakima. Once in Yakima, US 97 joins I-82 and US 12 through Downtown Yakima and US 12 separates north of Yakima and I-82 ends at a junction with I-90 in Ellensburg. US 97 joins I-90 at that point and exits off to join SR 10 (former US 10). After leaving SR 10, US 97 continues north to join US 2 and intersect US 97A before leaving US 2 and continuing north to Chelan. In Chelan, US 97 intersects US 97A again before continuing north to Canada. [75][76][77]
US 195 93.37 miles (150.26 km) US-195 at Idaho state line near Uniontown I-90/US 2/US 395 in Spokane Whitman, Spokane US 195 starts at the Idaho state line near Clarkston. From the border, US 195 intersects US 195 Spur (which connects US 195 to US 95 in Idaho), SR 27, SR 194, SR 270, and SR 272 before reaching Colfax, where it intersects SR 26, which used to be U.S. Route 295. After intersecting SR 23 and SR 271, US 195 ends at an interchange with I-90, US 2, and US 395 in Spokane. [78][79][80]
US 395 275.03 miles (442.62 km) I-82/US 395 at Oregon state line in Plymouth[notes 3] Hwy 395 at Canadian border near Laurier Benton, Franklin, Adams, Lincoln, Spokane, Stevens, Ferry US 395 begins on the Umatilla Bridge over the Columbia River, concurrent with I-82. US 395 continues concurrent until the road splits south of Kennewick and US 395 continues into Pasco on the Blue Bridge over the Columbia River. US 395 then becomes concurrent with I-182 and US 12 and later I-182 ends and US 395 splits from US 12 and continues to Ritzville. In Ritzville, US 395 becomes concurrent with I-90 and goes northeast into Spokane where it joins US 2 and exits off of I-90. North of Spokane, US 2 splits and US 395 goes northwest towards Colville, where it becomes concurrent with SR 20 and continues north to Canada where it becomes British Columbia Highway 395. [81][82][83]
US 197 3.18 miles (5.12 km) US 197 at Oregon state line near Dallesport SR 14 near Dallesport[notes 4] Klickitat US 197 starts on the The Dalles Bridge over the Columbia River at the Oregon state line. From there, US 197 goes north to SR 14, where it ends. [10][84][85]
US 730 6.08 miles (9.78 km) US 730 at Oregon state line near Wallula[notes 5] US 12 near Wallula Walla Walla US 730 begins at the Oregon state line and continues northeast to end at US 12 near Wallula. [86][87][88]

US 101 in Downtown Aberdeen near its intersection with the western terminus of US 12.

US 12 passing through White Pass eastward towards Yakima.

The Blue Bridge carries US 395 over the Columbia River from Kennewick to Pasco.

[edit] Former U.S. highways

Route number Length[14] Western / southern terminus[89][90] Eastern / northern terminus[89][90] Counties[89][90] Description[89][90] References
US 10[notes 6] 397 miles (639 km) King, Kittitas, Grant, Adams, Lincoln, Spokane US 99 in Seattle US-10 at Idaho state line near Spokane US 10 started in Seattle and went east across the Lake Washington Floating Bridge and passed Snoqualmie Pass before it joined US 97 for a short distance in Ellensburg. After passing Ellensburg, US 10 joined US 395 in Ritzville, and US 2 west of Spokane and continued into Downtown Spokane. In Downtown, US 10 intersected US 195 before splitting from US 2 and US 395 and continuing into Idaho. [91][92][93]
US 295[notes 7] 45 miles (72 km) Garfield, Whitman US 12 (former US 410) near Pomeroy US 195 in Colfax US 295 started at an intersection with US 410 and went north to cross the Snake River before going east to US 195 in Colfax. [94][95][96]
US 410[notes 8] 469 miles (755 km) Grays Harbor, Thurston, Pierce, King, Yakima, Benton, Franklin, Walla Walla, Columbia, Garfield, Asotin US 101 in Aberdeen US-410 at Idaho state line in Clarkston US 410 started at an intersection with US 101 in Aberdeen. From Aberdeen, US 410 went east and joined US 101 and then split from US 101 to join I-5 south ofOlympia. From Olympia, US 410 and I-5 went into Tacoma, where US 410 spilt and went east to Chinook Pass and crossed the pass. From Chinook Pass, US 410 joined US 97 in Yakima and split in West Richland. From West Richland, US 410 went east across the Columbia River and shortly joined US 395 before continuing east to intersect US 295. From US 295, US 410 went east to Clarkston, where it crossed the Snake River and entered Idaho. [97][98][99]
US 830[notes 9] 209 miles (336 km) Pacific, Wahkiakum, Cowlitz, Clark, Skamania, Klickitat US 101 in Johnson's Landing US 97 near Maryhill US 830 started at US 101 in Johnson's Landing and went east to Kelso. From Kelso, US 830 became concurrent with US 99 and split in Vancouver, where it started to follow the Columbia River. North of Dallesport, US 830 joined US 197 and ended, along with US 197, at US 97 near Maryhill. [100][101][102]
US 95[notes 10] 0.54 miles (0.87 km) Whitman US-95/US-195 at Idaho state line near Uniontown US-95 at Idaho state line near Uniontown US 95 entered Washington north of Lewiston, Idaho for 0.54 miles (0.87 km), partially concurrent with U.S. Route 195. The route was moved to a new 4-laned divided road that bypassed Washington in the 1970s. [103]
US 99[notes 11] 387 miles (623 km) Clark, Cowlitz, Lewis, Thurston, Pierce, King, Snohomish County, Skagit, Whatcom US 99 at Oregon state line in Vancouver Hwy 99 at Canadian border in Blaine US 99 starts at the Oregon border over the Columbia River and goes north to intersect US 830. From US 830, US 99 leaves Vancouver and intersects US 101 and US 410 in Olympia. After joining with US 410 in Olympia, US 99 splits from US 410 in Tacoma and continues north to Seattle. In Seattle, US 99 intersects US 10 and then goes north to Everett, where US 99 intersects US 2. From Everett, US 99 travels north to Blaine, where US 99 crosses the Canadian border and becomes British Columbia Highway 99. [104][105][106]

The original 1926 plan for the U.S. highway system. All former U.S. highways in Washington are on the map.

The George Washington Memorial Bridge, commonly called the Aurora Bridge, carried US 99 over the Lake Washington Ship Canal from 1926 to 1968. The bridge now carries SR 99, a large portion of US 99's former route.

[edit] Notes

  1. ^ Interstate 82's number is a violation of the Interstate numbering scheme because at the time when I-82 was built, I-84 was known as I-80N, and when the AASHTO wanted to renumber suffixed Interstates, I-80N became I-84.
  2. ^ I-82 was originally intended to go west from Yakima to Chinook Pass and north to Tacoma.
  3. ^ US 395 originally ran from US 10 and US 195 in Spokane to Hwy 395 at the Canadian border. When US 395 was extended to Oregon in the 1930's, US 395 was co-signed with US 410 (today known as US 12 to Wallula where US 395 followed US 730 into Oregon. US 395 was moved to its current route in 1985, after the construction of I-82.
  4. ^ In the original 1926 plan, US 197 continued from SR 14 (then known as US 830) east to US 97 near Maryhill.
  5. ^ US 730 was co-signed with US 395 for its whole portion in Washington from the 1930's to 1985, when US 395 was moved to I-82.
  6. ^ US 10 went along the route of SR 900 from 1926 to 1940. When the Lake Washington Floating Bridge opened in 1940, US 10 was rerouted on the bridge. US 10 has been largely replaced by I-90.
  7. ^ US 295 has been replaced by SR 127 and a portion of SR 26.
  8. ^ US 410 has been replaced by US 12, SR 8, US 101, I-5, SR 167, SR 410, and US 12.
  9. ^ US 830 has been replaced by SR 4, I-5, and SR 14.
  10. ^ US 95 has been replaced by US 195 and US 195 Spur.
  11. ^ US 99 has been largely replaced by I-5.

[edit] References

General
  1. Rand McNally. The Road Atlas [map]. (2008) ISBN 0528939610.
  2. Rand McNally. The Thomas Guide Pacific Northwest Road Atlas [map], 7th edition. (2006) ISBN 0528858696.
Specific
  1. ^ a b c d e Washington State Department of Transportation, State Highway Log, 2006
  2. ^ a b c d e f g h i j k l m n Washington State Department of Transportation. Official State Highway Map [map], 2008-2009 edition, Official State Highway Maps. (2008) Retrieved on July 31, 2008
  3. ^ WSDOT. "WSDOT History (1905-1920)". http://www.wsdot.wa.gov/Centennial/1905-1920.htm. Retrieved on 2008-07-31. 
  4. ^ WSDOT. "WSDOT History (1921-1940)". http://www.wsdot.wa.gov/Centennial/1921-1940.htm. Retrieved on 2008-06-16. 
  5. ^ WSDOT. "WSDOT History (1941-1960)". http://www.wsdot.wa.gov/Centennial/1941-1960.htm. Retrieved on 2008-07-31. 
  6. ^ WSDOT. "WSDOT History (1961-1977)". http://www.wsdot.wa.gov/Centennial/1961-1977.htm. Retrieved on 2008-07-31. 
  7. ^ a b Interstate Guide (2008-07-29). "Interstate 90". http://www.interstate-guide.com/i-090.html. Retrieved on 2008-07-31. 
  8. ^ a b Interstate Guide (2006-09-16). "Interstate 705". http://www.interstate-guide.com/i-705_wa.html. Retrieved on 2008-07-31. 
  9. ^ a b Google Maps. U.S. Route 12 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  10. ^ a b Google Maps. U.S. Route 197 Overview Map [map]. Cartography by NAVTEQ. (2008) Retrieved on 2008-06-20.
  11. ^ Google Maps. SR 20 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-08-01.
  12. ^ Google Maps. SR 433 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-08-01.
  13. ^ Washington State Department of Transportation, State Route Web
  14. ^ a b Droz, Robert V.. "U.S. Highways : From US 1 to (US 830)". http://www.ushighways.com/usbt.htm. Retrieved on 2008-07-31. 
  15. ^ West Coast Roads (2006-04-05). "Interstate 5 Description (Vancouver to Longview)". http://www.westcoastroads.com/washington/i-005a_wa.html. Retrieved on 2008-07-31. 
  16. ^ West Coast Roads (2006-04-05). "Interstate 5 Description (Longview to Thurston County)". http://www.westcoastroads.com/washington/i-005b_wa.html. Retrieved on 2008-07-31. 
  17. ^ West Coast Roads (2006-08-21). "Interstate 5 Description (Thurston County)". http://www.westcoastroads.com/washington/i-005c_wa.html. Retrieved on 2008-07-31. 
  18. ^ Interstate Guide (2006-12-06). "Interstate 5". http://www.interstate-guide.com/i-005.html. Retrieved on 2008-07-31. 
  19. ^ Google Maps. Interstate 5 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  20. ^ Google Maps. Interstate 5 (Oregon State Line) [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  21. ^ Google Maps. Interstate 5 (Canadian border) [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  22. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 5 (Exit 1A to 32)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i5/I5_NKalamaOreBorder.htm. Retrieved on 2008-08-10. 
  23. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 5 (Exit 36 to 63)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i5/I5_WinlockToKelsoLong.htm. Retrieved on 2008-08-10. 
  24. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 5 (Exit 68 to 118)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i5/I5_NNisqToNapavine.htm. Retrieved on 2008-08-10. 
  25. ^ a b Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 5 (Exit 119 to 152)/Interstate 705". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i5/I5_SeaTacToDupont.htm. Retrieved on 2008-08-10. 
  26. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 5 (Exit 154A to 182)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i5/I5_NLynnwoodToSeaTac.htm. Retrieved on 2008-08-10. 
  27. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 5 (Exit 183 to 229)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i5/I5_NMtVernonSEverett.htm. Retrieved on 2008-08-10. 
  28. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 5 (Exit 230 to 276)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/I5_CanadianBorderSoBurlington.htm. Retrieved on 2008-08-10. 
  29. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 5 Reversible Express Lanes". http://www.wsdot.wa.gov/Traffic/InterstateGuide/I5ExpressLanes.htm. Retrieved on 2008-08-10. 
  30. ^ Interstate Guide (2006-09-10). "Interstate 82". http://www.interstate-guide.com/i-082.html. Retrieved on 2008-07-31. 
  31. ^ Google Maps. Interstate 82 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  32. ^ Google Maps. Interstate 82/U.S. Route 395 (Oregon State Line) [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  33. ^ Google Maps. Interstate 82/Interstate 90/U.S. Route 97 Interchange [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  34. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 82 (Exit 3 to 54)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/I82_EllensbToEZillah.htm. Retrieved on 2008-08-10. 
  35. ^ a b Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 82 (Exit 58 to 131)/Interstate 182". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i82/I82_GrangerToOreBorder.htm. Retrieved on 2008-08-10. 
  36. ^ Interstate Guide (2009-09-24). "Interstate 90 Western Terminus". http://www.interstate-guide.com/i-090w.html. Retrieved on 2008-07-31. 
  37. ^ Google Maps. Interstate 90 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  38. ^ Google Maps. Interstate 90/SR 519 Interchange [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  39. ^ Google Maps. Interstate 90 (Idaho State Line) [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  40. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 90 (Exit 2B to 22)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/I90_SeattleToEIssaquah.htm. Retrieved on 2008-08-10. 
  41. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 90 (Exit 25 to 78)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i90/I90_AuburnToEastEaston.htm. Retrieved on 2008-08-10. 
  42. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 90 (Exit 80 to 149)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i90/I90_WCleElumToEastGeo.htm. Retrieved on 2008-08-10. 
  43. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 90 (Exit 151 to 215)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i90/I90_GeorgeToRitzville.htm. Retrieved on 2008-08-10. 
  44. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 90 (Exit 220 to 279)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i90/I90_RitzvilleToSpokane.htm. Retrieved on 2008-08-10. 
  45. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 90 (Exit 280 to 299)". http://www.wsdot.wa.gov/Traffic/InterstateGuide/i90/I90_WSpokaneIdahoBor.htm. Retrieved on 2008-08-10. 
  46. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 90 Reversible Express Lanes". http://www.wsdot.wa.gov/Traffic/InterstateGuide/I90ExpressLanes.htm. Retrieved on 2008-08-10. 
  47. ^ Interstate Guide (2006-09-10). "Interstate 205". http://www.interstate-guide.com/i-205_orwa.html. Retrieved on 2008-07-31. 
  48. ^ Google Maps. Interstate 205 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  49. ^ Google Maps. Interstate 205 (Oregon State Line) [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  50. ^ Google Maps. Interstate 205/Interstate 5 Interchange [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  51. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 205". http://www.wsdot.wa.gov/Traffic/InterstateGuide/205.htm. Retrieved on 2008-08-10. 
  52. ^ Interstate Guide (2006-09-26). "Interstate 405". http://www.interstate-guide.com/i-405_wa.html. Retrieved on 2008-07-31. 
  53. ^ Google Maps. Interstate 405 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  54. ^ Google Maps. Interstate 405/Interstate 5/SR 518 Interchange [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  55. ^ Google Maps. Interstate 405/Interstate 5/SR 525 Interchange [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  56. ^ Washington State Department of Transportation. "WSDOT Interchange Viewer - Interstate 405". http://www.wsdot.wa.gov/Traffic/InterstateGuide/I405_NBothellSRenton.htm. Retrieved on 2008-08-10. 
  57. ^ Klockow, Jim (2004-07-15). "I-605: The highway that won't die" (in English) (HTML). Seattle, Washington: KING 5. http://www.king5.com/topstories/stories/NW_071504WABi605JK.2ffde016b.html. Retrieved on 2008-07-31. 
  58. ^ Solomon, Chris (2002-04-29). "Seattle's Puget Sound Region Is Site of I-605 Freeway Proposal Debate.". The Seattle Times, Knight-Ridder/Tribune Business News. http://www.accessmylibrary.com/coms2/summary_0286-6809561_ITM. Retrieved on 2008-08-03. 
  59. ^ Pryne, Eric (2005-10-27). "Backing for interstate proposal disputed" (in English) (HTML). The Seattle Times (Seattle, Washington: The Seattle Times). ISSN 0745-9696. http://seattletimes.nwsource.com/html/localnews/2002586071_605freeway27m.html. Retrieved on 2008-07-31. 
  60. ^ Google Maps. Interstate 705 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  61. ^ Google Maps. Interstate 705/Interstate 5/SR 7 [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  62. ^ Google Maps. Interstate 705/Schuster Parkway [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
  63. ^ Interstate Guide (2006-09-10). "Interstate 182". http://www.interstate-guide.com/i-182_wa.html. Retrieved on 2008-07-31. 
  64. ^ Google Maps. Interstate 182 Overview Map [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
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  66. ^ Google Maps. Interstate 182/U.S. Route 12/U.S. Route 395 Interchange [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-07-31.
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  93. ^ Google Maps. Former U.S. Route 10 (Idaho State Line) [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-08-02.
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  99. ^ Google Maps. Former U.S. Route 410 (Idaho State Line) [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-08-02.
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  102. ^ Google Maps. Former U.S. Route 830 [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-08-02.
  103. ^ Google Maps. Former U.S. Route 95 Overview Map [map]. Cartography by NAVTEQ. (2008) Retrieved on 2008-05-27.
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  105. ^ Google Maps. Former U.S. Route 99 (Oregon State Line) [map]. Cartography by NATVEQ. (2008) Retrieved on 2008-08-02.
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Blank US Interstate Highway shield Interstates in Washington

I-5    I-82    I-90    I-182    I-205    I-405    I-605    I-705
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