Editing Interstate 90 (section)

===Washington===
{{Main|Interstate 90 in Washington}}
[[File:I-90 as seen from Mount Si.jpg|thumb|right|Aerial view of I-90 near [[North Bend, Washington]]|alt=Aerial view of a divided highway making two turns in a densely forested area.]]

The western terminus of I-90 is at an intersection with [[Washington State Route 519|Washington State Route&nbsp;519]] and 4th Avenue South in the [[Sodo, Seattle|SoDo]] neighborhood of [[Seattle]]. The junction is south of [[Downtown Seattle]], adjacent to the [[Port of Seattle]] and two major sports stadiums, [[Lumen Field]] and [[T-Mobile Park]].<ref>{{cite news |last=Lindblom |first=Mike |date=August 6, 2008 |title=Port clears way for I-90 link to waterfront |page=B2 |url=http://old.seattletimes.com/html/localnews/2008094653_sodo06m.html |work=[[The Seattle Times]] |url-status=dead |archive-url=https://web.archive.org/web/20180616130827/http://old.seattletimes.com/html/localnews/2008094653_sodo06m.html |archive-date=June 16, 2018 |accessdate=November 28, 2021}}</ref> The freeway travels east through an interchange with [[Interstate 5|I-5]] and around [[Beacon Hill, Seattle|Beacon Hill]] before it enters the [[Mount Baker Ridge Tunnel]] alongside the future [[2 Line (Sound Transit)|2&nbsp;Line]] of the [[Link light rail]] system, set to open in 2025.<ref name="Times-Floating">{{cite news |last=Lee |first=Jessica |date=May 11, 2017 |title=From the archives: A look back at the I-90 floating bridges before light-rail work begins |url=https://www.seattletimes.com/seattle-news/transportation/from-the-archives-a-look-back-on-i-90-floating-bridges-before-light-rail-work-begins/ |work=The Seattle Times |accessdate=November 28, 2021 |archive-date=November 29, 2021 |archive-url=https://web.archive.org/web/20211129064619/https://www.seattletimes.com/seattle-news/transportation/from-the-archives-a-look-back-on-i-90-floating-bridges-before-light-rail-work-begins/ |url-status=live }}</ref><ref>{{cite news |last=Lindblom |first=Mike |date=March 10, 2023 |title=Sound Transit will shell out millions to keep pace with construction delays |url=https://www.seattletimes.com/seattle-news/transportation/sound-transit-will-shell-out-millions-to-keep-pace-with-construction-delays/ |work=The Seattle Times |accessdate=August 23, 2023 |archive-date=August 24, 2023 |archive-url=https://web.archive.org/web/20230824065723/https://www.seattletimes.com/seattle-news/transportation/sound-transit-will-shell-out-millions-to-keep-pace-with-construction-delays/ |url-status=live }}</ref> I-90 emerges from the tunnel on a pair of [[pontoon bridge|floating bridge]]s, among the longest of their kind: the eastbound-only [[Lacey V. Murrow Memorial Bridge]] and the [[Homer M. Hadley Memorial Bridge]], which carries westbound traffic and the future light rail line.<ref name="Times-Floating"/><ref name="WSDOT-Map">{{cite WSDOT map |year=2014 |link=yes |accessdate=November 28, 2021}}</ref>

The floating bridges cross [[Lake Washington]] to [[Mercer Island, Washington|Mercer Island]], where I-90 travels through a series of tunnels under {{convert|14|acre|ha}} of parkland, including [[Aubrey Davis Park]].<ref name="Times-90Saga">{{cite news |last=Reynolds |first=Peggy |date=September 9, 1993 |title=Last link of I-90 ends 30-year saga |page=A10 |url=https://archive.seattletimes.com/archive/?date=19930909&slug=1720198 |work=The Seattle Times |access-date=November 28, 2021 |archive-date=October 5, 2021 |archive-url=https://web.archive.org/web/20211005014301/https://archive.seattletimes.com/archive/?date=19930909&slug=1720198 |url-status=live }}</ref><ref>{{cite news |last=Johnston |first=Steve |date=September 9, 1993 |title=Hey Johnston: What's that big concrete thing floating on Lake Washington? |page=1 |url=https://archive.seattletimes.com/archive/?date=19930909&slug=1720153 |work=The Seattle Times |access-date=November 28, 2021 |archive-date=October 9, 2022 |archive-url=https://web.archive.org/web/20221009232848/https://archive.seattletimes.com/archive/?date=19930909&slug=1720153 |url-status=live }}</ref> The freeway continues from the island and enters [[Bellevue, Washington|Bellevue]], the largest city of the [[Eastside (King County, Washington)|Eastside]] region, and intersects [[Interstate 405 (Washington)|I-405]] near [[Factoria, Bellevue|Factoria]]. I-90 then travels along [[Lake Sammamish]] and through [[Issaquah, Washington|Issaquah]] as it leaves the Seattle metropolitan area and ascends into the [[Cascade Range]] on the [[Mountains to Sound Greenway]], a designated [[National Heritage Area]] and [[National Scenic Byway]].<ref>{{cite web |title=Mountains to Sound Greenway National Heritage Area |url=https://www.nps.gov/places/mountains-to-sound-greenway-national-heritage-area.htm |publisher=[[National Park Service]] |accessdate=November 28, 2021 |archive-date=November 29, 2021 |archive-url=https://web.archive.org/web/20211129064619/https://www.nps.gov/places/mountains-to-sound-greenway-national-heritage-area.htm |url-status=live }}</ref> The freeway crosses [[Snoqualmie Pass]], elevation {{convert|3,022|ft|m}}, at the crest of the mountain range near a [[The Summit at Snoqualmie|ski resort]].<ref>{{cite news |last=Hill |first=Craig |date=January 10, 2014 |title=Snoqualmie opening benefits all |page=A1 |work=[[The News Tribune]] |url=https://www.newspapers.com/clip/89735243/snoqualmie-opening-benefits-all/ |via=[[Newspapers.com]] |accessdate=November 28, 2021 |archive-date=November 29, 2021 |archive-url=https://web.archive.org/web/20211129064620/https://www.newspapers.com/clip/89735243/snoqualmie-opening-benefits-all/ |url-status=live }}</ref>

From Snoqualmie Pass, I-90 follows the [[Yakima River]] into the [[Kittitas Valley]] and intersects [[Interstate 82|I-82]] in [[Ellensburg, Washington|Ellensburg]] after a brief [[concurrency (road)|concurrency]] with [[U.S. Route 97]] (US&nbsp;97). The highway crosses the [[Columbia River]] on the [[Vantage Bridge]] and turns northeast to climb the cliffs of the [[Columbia Plateau]] near [[George, Washington|George]]. After traveling east across [[Moses Lake, Washington|Moses Lake]] and the surrounding agricultural region, I-90 begins a long concurrency with [[U.S. Route 395|US&nbsp;395]] at [[Ritzville, Washington|Ritzville]] as the highways turn northeast towards [[Spokane, Washington|Spokane]]. I-90/US&nbsp;395 is joined by [[U.S. Route 2|US&nbsp;2]] through western Spokane, where it intersects [[U.S. Route 195|US&nbsp;195]]. The freeway crosses downtown Spokane on an elevated viaduct and splits from US&nbsp;2 and US&nbsp;395 to continue east across [[Spokane Valley, Washington|Spokane Valley]] towards the Idaho state line.<ref name="WSDOT-Map"/>