Overnight lane reductions and ramp closures March 12, 13 will affect people using I-5 through Seattle

Seattle's overnight travelers on Interstate 5 should prepare for lane reductions and ramp closures on March 12 and 13, impacting both northbound and southbound traffic. Northbound I-5 will be narrowed to two lanes between 9 p. m. and 5 a. m.

, with the Harvard Avenue East on-ramp also closing for maintenance. Concurrently, southbound I-5 will close the right lane just south of the Lake Washington Ship Canal Bridge, along with the Boylston Avenue East off-ramp, from 10 p. m. to 5 a. m.

These closures are part of essential maintenance work by the Washington State Department of Transportation (WSDOT), setting the stage for the I-5/Yesler Way to Northgate Vicinity project aimed at enhancing traffic flow. Furthermore, the northbound I-5 off-ramp to Mercer Street and the eastbound Mercer on-ramp will be closed from 9 p. m. to 6 a. m.

for tunnel drainage inspections. WSDOT is providing signed detours to assist drivers around these closures. Real-time travel information can be accessed through the WSDOT mobile app, ensuring travelers stay informed. Those affected are advised to plan ahead to mitigate delays and detours during these critical maintenance nights.