The Northgate Link light rail extension in Seattle is about 70% complete and on track to open in 2021.

Progress on Sound Transit's Northgate Link construction includes track installation, which is nearing 50 % completion. In addition, construction at each of the three new stations in the U District, Roosevelt and Northgate neighbourhoods has reached a significant milestone. The Northgate and Roosevelt stations are approximately 70 % complete and the University District Station is 50 % complete.

When finished, the 6,9 km (4.3 mile) regional light rail extension will offer riders reliable, traffic-free travel between Northgate and downtown Seattle in just 14 minutes. Trains traveling in 5.6km (3.5-mile) twin tunnels north to and from the University of Washington Station at Husky Stadium will stop at underground stations in the U District and Roosevelt neighbourhoods, exit the tunnels at First Avenue Northeast and Northeast 95th and transition to a 1.3km (0.8-mile) elevated guideway to reach the station.

Sound Transit is simultaneously working to extend light rail north, south, east and west, opening new stations every few years to form a 187km (116-mile) regional system by 2041. Northgate Link will be followed in 2023 by the opening of service to Mercer Island, Bellevue and Redmond's Overlake community. Additional extensions to Shoreline, Mountlake Terrace, Lynnwood, Kent/Des Moines, Federal Way and downtown Redmond are planned in 2024. Further light rail extensions are scheduled to reach West Seattle, Fife and Tacoma in 2030; Ballard in 2035; Paine Field and Everett in 2036; and South Kirkland and Issaquah in 2041.

Click here for the video, here and us/42 for tunnelbuilder archive. Visit http://www.soundtransit.org/Projects-and-Plans/Northgate-Link-Extension/Project-updates.

05/19.