Construction of all three stations was substantially complete at the start of 2021, and trains have been running a simulated service since August, during which all Link trains continued without riders from University of Washington Station to Northgate, testing catenary traction power and signal systems, according to Sound Transit. Elevated guideway construction was completed in 2018 and rail installation in 2019. Tunnelling work was performed by JCM Northlink, a joint venture of Jay Dee Contractors, Frank Collucio Construction Company and Michaels Corporation, and twin boring machines completed the 5.6km tunnels in 2016. Voters approved the Northgate Link extension in 2008 as part of the Sound Transit 2 ballot measure, and construction began in 2012. The project’s $US 1.9bn baseline budget includes a $US 615m credit agreement under the Transportation Infrastructure Finance and Innovation Act (TIFIA), providing “significant long-term savings for regional taxpayers through reduced borrowing costs,” according to Sound Transit, which noted that the project is coming in around $US 50m under budget. Additionally, the opening of Northgate provides connections to and from local and regional bus routes. Daily ridership is projected to reach 41,000-49,000 by 2022. ![]() The extension runs underground except for 1.2km of elevated track at Northgate. The Northgate extension project adds three new stations, at Northgate (elevated), Roosevelt (underground) and U District (underground), with a 13-minute journey time from Northgate to central Seattle. Services to Tacoma’s Hilltop are slated to begin in 2022 East King County in 2023 and Lynnwood, Federal Way and Downtown Redmond in 2024, according to Sound Transit. ![]() SOUND Transit opened its 6.9km Northgate light rail extension on October 2, marking the start of the Seattle metro area transit system’s three-year plan to triple its light rail network from 35.4km to 99.7km.
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