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Closure of northbound I-5 highway and ramps at Mountlake Terrace scheduled overnight for May 20-22

Overnight closures will be to remove falsework over freeway

Publish Date

Crews working on the Lynnwood Link Extension will be closing the northbound lanes of I-5 between State Route 104 and 220th Avenue SW in Mountlake Terrace (MLT) overnight starting on Friday, May 20 through Sunday, May 22.

Starting as early as 11 p.m. on Friday, the northbound lanes of I-5 will be closed until 6 a.m. the following morning. The northbound lanes will close as early as 11 p.m. on Saturday and will reopen at 6:30 a.m. the following morning. On Sunday, the northbound lanes will close as early as 11 p.m. and will reopen at 4 a.m. the following morning. 

For all three nights, the SR 104 eastbound and westbound on-ramps will close at 9 p.m. Traffic will be detoured and will re-join I-5 at 220th Street SW. The MLT Flyover south and north ramps will remain closed all weekend.  

To minimize impacts to drivers, northbound I-5 traffic will need to follow designated detour routes. Southbound traffic lanes will remain open. 

The closure is necessary for the removal of falsework for span supports. The falsework, which was erected in the fall of 2020, is a temporary steel column system between and outside of the girders used to support the construction of the concrete deck on top of which the light rail trains will travel. 

Lynnwood Link will extend light rail into Snohomish County, serving four stations, Shoreline South/148th, Shoreline North/185th, Mountlake Terrace and Lynnwood City Center. Upon its opening, riders will enjoy fast, frequent and reliable service between south Snohomish County and the University of Washington, downtown Seattle, the Eastside, Sea-Tac Airport and more. For more information, please visit