Community Transit announced plans for a second Swift line in November 2013, tentatively named "Swift II", that would serve a 12.5-mile-long (20.1 km) corridor between the Boeing Everett Factory and Mill Creek. The line was created out of two Transit Emphasis Corridors on Airport Road and State Route 527.: 59 A study was partially funded by the state legislature in 2012 and was prepared by Parsons Brinckerhoff, determining that the project would cost $42–48 million to construct and attract 3,300 riders when it opened.
In August 2016, Community Transit announced that the Swift II project would be known as the "Green Line", while the first line would become the "Blue Line", and that the line would open in 2019. The $73 million cost of the Swift Green Line project was mostly covered by federal subsidies, including $43 million from a Federal Transit Administration "Small Starts" grant awarded in 2018. An additional $6.8 million grant from the Washington State Department of Transportation was used to build the line's northern terminus at Seaway Transit Center.
Construction on the Seaway Transit Center began in May 2017 and was scheduled to be finished by mid-2018. Construction on the rest of the stations and the 128th Street overpass began in November 2017. The queue jump and bus lane on the west side of the 128th Street interchange was opened in January 2018. Service began on March 24, 2019, a few weeks after the start of passenger flights to Paine Field.
The Green Line serves 34 stations, grouped into 18 pairs with two terminals, in the cities of Everett, Mill Creek, and Bothell. Each station has a raised platform for level boarding, ticket vending machines, ORCA card readers, and real-time arrivals information. The Blue Line intersects at the Highway 99 station, requiring a street crossing to complete the connection. The line also serves two park and ride lots at Mariner and McCollum Park.
At its debut, the Green Line ran at a frequency of every 10 minutes on weekdays from 6 a.m. to 7 p.m., and 20 minutes on weekends and early mornings and nights on weekdays. The earliest trips departed at 4:20 a.m. on weekdays, 6 a.m. on Saturdays, and 7 a.m. on Sundays. The last trips ended at 11 p.m. on weekdays, 10 p.m. on Saturdays, and 8:40 p.m. on Sundays. It takes approximately 36 to 39 minutes for buses to travel the entire length of the Green Line.
Service on the Green Line was reduced to every 15 minutes on weekdays in March 2020 due to the COVID-19 pandemic. Fare collection was also suspended until June 1 to increase physical distancing between passengers, drivers, and fare ambassadors. Full service was restored in September 2020, but was reduced again to 12 minute weekday frequencies in March 2022 due to a lack of drivers.
Munguia, Martin (November 8, 2013). "Special session: Don't forget Community Transit". Community Transit Blog. Community Transit. Archived from the original on July 23, 2015. Retrieved July 21, 2015. http://communitytransit.blogspot.com/2013/11/special-session-dont-forget-community.html
2016–2021 Transit Development Plan (PDF) (Report). Community Transit. May 5, 2016. Archived from the original (PDF) on May 14, 2016. Retrieved May 14, 2016. https://web.archive.org/web/20160514235320/http://www.commtrans.org/Programs/Documents/ADOPTED%202016-2021%20TDP%2005-05-2016.pdf
Parsons Brinckerhoff (August 2014). "Executive Summary" (PDF). Community Transit BRT Corridor Planning and Route Definition Study: Boeing to Canyon Park (Report). Community Transit. pp. 1–5. Archived from the original (PDF) on September 23, 2015. Retrieved July 21, 2015. /wiki/Parsons_Brinckerhoff
"Swift Bus Rapid Transit Turns 5!" (Press release). Everett, Washington: Community Transit. December 1, 2014. Archived from the original on July 14, 2015. Retrieved July 21, 2015. https://web.archive.org/web/20150714101322/http://www.communitytransit.org/newsrelease/1586
"FTA Approves Project Development for Swift II" (Press release). Everett, Washington: Community Transit. December 23, 2014. Archived from the original on February 22, 2015. Retrieved July 21, 2015. https://web.archive.org/web/20150222050745/http://www.communitytransit.org/newsrelease/1591
"Community Transit Board Sends Sales Tax Measure to November Ballot" (Press release). Everett, Washington: Community Transit. July 16, 2015. Archived from the original on August 15, 2015. Retrieved July 21, 2015. https://web.archive.org/web/20150815001844/http://communitytransit.org/newsrelease/1616
"FTA Approves Project Development for Swift II" (Press release). Everett, Washington: Community Transit. December 23, 2014. Archived from the original on February 22, 2015. Retrieved July 21, 2015. https://web.archive.org/web/20150222050745/http://www.communitytransit.org/newsrelease/1591
"FTA Approves Project Development for Swift II" (Press release). Everett, Washington: Community Transit. December 23, 2014. Archived from the original on February 22, 2015. Retrieved July 21, 2015. https://web.archive.org/web/20150222050745/http://www.communitytransit.org/newsrelease/1591
"CEO Outlines "New Transit Legacy" for Snohomish County" (Press release). Everett, Washington: Community Transit. November 10, 2015. Archived from the original on March 4, 2016. Retrieved November 25, 2015. https://web.archive.org/web/20160304185937/https://communitytransit.org/newsrelease/1631
"New Names: Swift Blue Line & Swift Green Line!" (Press release). Everett, Washington: Community Transit. August 12, 2016. Archived from the original on August 12, 2016. Retrieved August 12, 2016. https://web.archive.org/web/20160812222007/http://www.communitytransit.org/newsrelease/1663
Catchpole, Dan (August 13, 2016). "Community Transit honors Seahawks with 'Blue' and 'Green' names". The Everett Herald. Archived from the original on August 13, 2016. Retrieved August 13, 2016. http://www.heraldnet.com/news/community-transit-names-swift-bus-lines-in-honor-of-seahawks/
Gutman, David (April 9, 2018). "Snohomish County bus line secures federal funding despite Trump threats". The Seattle Times. Retrieved April 9, 2018. https://www.seattletimes.com/seattle-news/transportation/snohomish-county-bus-line-secures-federal-funding-despite-trump-threats/
Catchpole, Dan (August 13, 2016). "Community Transit honors Seahawks with 'Blue' and 'Green' names". The Everett Herald. Archived from the original on August 13, 2016. Retrieved August 13, 2016. http://www.heraldnet.com/news/community-transit-names-swift-bus-lines-in-honor-of-seahawks/
Catchpole, Dan (August 13, 2016). "Community Transit honors Seahawks with 'Blue' and 'Green' names". The Everett Herald. Archived from the original on August 13, 2016. Retrieved August 13, 2016. http://www.heraldnet.com/news/community-transit-names-swift-bus-lines-in-honor-of-seahawks/
Slager, Melissa (May 8, 2017). "Community Transit starts Paine Field work for rapid bus line". The Everett Herald. Archived from the original on May 8, 2017. Retrieved May 8, 2017. http://www.heraldnet.com/news/community-transit-starts-work-on-new-bus-rapid-transit-line/
"Construction Starts on Swift Green Line Stations" (Press release). Everett, Washington: Community Transit. November 15, 2017. Retrieved February 3, 2018. https://www.communitytransit.org/news/community-transit-news/2017/11/16/construction-starts-on-swift-green-line-stations
Slager, Melissa (November 27, 2017). "Community Transit starts construction on Green Line stations". The Everett Herald. Retrieved February 3, 2018. http://www.heraldnet.com/news/community-transit-starts-construction-on-green-line-stations/
"New Bus Lane Opens on 128th St & I-5" (Press release). Everett, Washington: Community Transit. January 17, 2018. Retrieved February 3, 2018. https://www.communitytransit.org/news/community-transit-news/2018/01/17/new-bus-lane-opens-on-128th-st-i-5
Haglund, Noah (December 25, 2018). "Green Line Swift buses get green light to start on March 24". The Everett Herald. Retrieved January 9, 2019. https://www.heraldnet.com/news/green-line-swift-buses-get-green-light-to-start-on-march-24/
Hansen, Jordan (October 22, 2023). "Swift bus lines expanding in Bothell, Marysville, Arlington". The Everett Herald. Retrieved November 2, 2023. https://www.heraldnet.com/news/swift-bus-lines-expanding-in-bothell-marysville-arlington/
Spain, Monica (October 16, 2023). "Locations considered for Swift Green Line stations in Bothell" (Press release). Community Transit. Retrieved November 2, 2023. https://www.communitytransit.org/news-and-events/article-detail/2023/10/17/locations-considered-for-swift-green-line-stations-in-bothell
"Swift Green Line Extension". Community Transit. Retrieved November 2, 2023. https://www.communitytransit.org/projects/swift-green-line-extension
Giordano, Lizz (March 25, 2019). "Swift Green Line starts rolling, from Bothell to Boeing". The Everett Herald. Retrieved March 29, 2019. https://www.heraldnet.com/news/swift-green-line-starts-rolling-from-bothell-to-boeing/
"Swift Network News Vol 2., Issue 62". Community Transit. December 7, 2018. Retrieved March 29, 2019. https://content.govdelivery.com/accounts/WACOMMT/bulletins/2203946
Giordano, Lizz (March 25, 2019). "Swift Green Line starts rolling, from Bothell to Boeing". The Everett Herald. Retrieved March 29, 2019. https://www.heraldnet.com/news/swift-green-line-starts-rolling-from-bothell-to-boeing/
Giordano, Lizz (March 25, 2019). "Swift Green Line starts rolling, from Bothell to Boeing". The Everett Herald. Retrieved March 29, 2019. https://www.heraldnet.com/news/swift-green-line-starts-rolling-from-bothell-to-boeing/
Giordano, Lizz (March 25, 2019). "Swift Green Line starts rolling, from Bothell to Boeing". The Everett Herald. Retrieved March 29, 2019. https://www.heraldnet.com/news/swift-green-line-starts-rolling-from-bothell-to-boeing/
Giordano, Lizz (March 25, 2019). "Swift Green Line starts rolling, from Bothell to Boeing". The Everett Herald. Retrieved March 29, 2019. https://www.heraldnet.com/news/swift-green-line-starts-rolling-from-bothell-to-boeing/
"Temporary Service Reductions to Begin Monday, March 30" (Press release). Community Transit. March 26, 2020. Retrieved February 28, 2022. https://www.communitytransit.org/news/community-transit-news/2020/03/26/service-reductions-to-begin-monday-march-30
Sanders, Julia-Grace (July 5, 2020). "Community Transit drivers: Too soon to open the front doors". The Everett Herald. Retrieved February 28, 2022. https://www.heraldnet.com/news/community-transit-drivers-too-soon-to-open-the-front-doors/
"2021–2026 Transit Development Plan" (PDF). Community Transit. September 2, 2021. p. 31. Retrieved February 28, 2022. https://www.communitytransit.org/docs/default-source/about-documents/community-transit_2021-transit-development-plan_adopted-9-2-21.pdf
"Community Transit targets improved reliability with spring service change" (Press release). Community Transit. February 23, 2022. Retrieved February 28, 2022. https://www.communitytransit.org/news/community-transit-news/2022/02/23/community-transit-targets-improved-reliability-with-spring-service-change