The Lynnwood Link extension is a Link light rail extension traveling north from Northgate to Lynnwood in Snohomish County, Washington, United States. The 8.5-mile (13.7 km) light rail extension includes stations in Lynnwood, Mountlake Terrace, and Shoreline along Interstate 5. It is served by 1 Line when it opened on August 30, 2024,[1] and the 2 Line in 2025. The project was funded by the Sound Transit 2 (ST2) package approved by voters in November 2008, and began construction in 2019.[2] Ridership is expected to be 47,000 to 55,000 daily on the section in 2026.[3]
Route and stations
Construction south of NE 145th Street, on a long section of viaduct, viewed from southbound I-5 in 2022
Route proposals for the extension in the early 2010s included paths along Interstate 5 (I-5) and State Route 99 (SR 99); a route preferred by Sound Transit on the latter alignment included an abrupt turn at the King–Snohomish county line to reach the Mountlake Terrace Transit Center and Mountlake Terrace's downtown. Despite the advocation of the SR 99 alignment from some urban theorists, the I-5 alignment was ultimately favored as the faster option when Sound Transit selected in 2011, reducing the project's cost by $600 million; this also avoided potential controversy over land acquisition and construction on SR 99.[4]
In August 2017, Sound Transit announced that the project would be delayed six months (from late 2023 to mid 2024) and would cost $500 million more than expected, bringing the final budget to $2.9 billion. The changes were due to rising costs associated with land acquisition, labor, and materials in the local market.[9]
The project's groundbreaking ceremony was held on September 3, 2019, and included Governor Jay Inslee, U.S. Senators Patty Murray and Maria Cantwell, and U.S. Representatives Rick Larsen and Suzan DelBene.[10] Testing of trains on the extension began in January 2024 and progressed in June to pre-revenue service with simulated schedules.[11][12]
Service on the 1 Line to Lynnwood began on August 30, 2024, with opening celebrations at all four stations.[13] An estimated 39,000 passengers boarded trains on the Lynnwood extension that day.[14] Construction delays on the 2 Line will limit the number of available trains to Lynnwood until 2025.[15] Major changes to the bus network in Shoreline and Snohomish County, including the truncation of most commuter buses, are scheduled for September 14, 2024.[16] Some Sound Transit Express buses will continue to connect Snohomish County to Downtown Seattle during peak hours to provide additional capacity until the 2 Line is extended in 2025.[17] An infill station at Northeast 130th Street in Seattle was funded by the Sound Transit 3 package and is scheduled to open in 2026.[18]
