The East Link Extension, also known as the 2 Line, is a future light rail line serving the Eastside region of the Seattle metropolitan area in the U.S. state of Washington. It will be part of Sound Transit's Link light rail system, running from west to east and serving 12 stations in Downtown Seattle, Mercer Island, Bellevue, and Redmond. The first section of the 2 Line, between South Bellevue and Redmond Technology stations, is scheduled to open in 2024. It is planned to be followed in 2025 by an extension east to Downtown Redmond and west to Seattle, where it will continue into the Downtown Seattle Transit Tunnel and share stations with the 1 Line through to Lynnwood City Center station.
The East Link project was approved by voters in the 2008 Sound Transit 2 ballot measure, with construction costs projected at $3.7 billion. The line will use the Homer M. Hadley Memorial Bridge, one of the Interstate 90 floating bridges, which was constructed in 1989 with the intent to convert its reversible express lanes to light rail. Early transit plans from the 1960s proposed an Eastside rail system, but preliminary planning on the system did not begin until Sound Transit's formation in the early 1990s.
The proposed alignment of the East Link project was debated by the Bellevue city council in the early 2010s, with members split on two different routes south of Downtown Bellevue; city funding for the downtown segment's tunnel was also debated and ultimately included in the final agreement. The alignment was finalized in 2013, after more than two years of debate, and delayed the beginning of construction to 2016 and the completion of the project from 2021 to 2023. The line will be the world's first railway constructed on a floating bridge and is expected to carry 50,000 daily riders by 2030.
History
Background and early proposals
The Eastside suburbs underwent rapid development into bedroom communities after the 1940 opening of the first Lake Washington floating bridge, which replaced a cross-lake ferry system as the main connection to Seattle. While private bus operators ran routes over the Lake Washington Floating Bridge from Seattle to Eastside towns, the municipal Seattle Transit System opted not to extend its routes. The 1963 opening of the Evergreen Point Floating Bridge fueled further growth, leading to traffic congestion on both bridges during peak periods. By 1965, more than 150,000 people lived on the Eastside; the King County government predicted in 1965 that up to 550,000 people would live in Eastside cities by 1990.
In the 1960s, the construction of a rapid transit system for the Seattle metropolitan area was explored by municipal and regional governments. The initial system, serving the city of Seattle, would be extended east to Bellevue via Mercer Island and an additional floating bridge in a later phase, to be built by 1990. The state government amended its plans for a parallel floating bridge to Mercer Island to include exclusive right of way for rapid transit. The Eastside section of the rapid transit system was expanded to include branches to Eastgate and the Bel-Red area, with provisions to extend the system to Redmond. Intermediate stations would be located at Rainier Avenue in Seattle, on Mercer Island, and in Downtown Bellevue. The proposal, funded with federal grants, was put to a public vote as part of the Forward Thrust referendums in 1968 and 1970, requiring a 60 percent majority in order to use increased property taxes. During both referendums, voters were unable to meet the required majority to approve the rapid transit plan; the first earned a simple majority, while the second failed due to local economic conditions.