SEATTLE – Northbound Interstate 5 is being shut down while transportation crews install new overhead electronic signs.
The northbound lane closures will begin at Boeing Access Road and end at the I-90 interchange. The closures go from 11:30 p.m. Friday to 6 a.m. Saturday and from 11:30 p.m. Saturday to 8 a.m. Sunday.
A signed detour will route drivers around the closure via Airport Way. Drivers should expect delays or take alternate routes such as Interstate 405 or State Route 599 to Highway 99.
Crews will also close the mainline of eastbound Interstate 90 between the Mount Baker Tunnel and the Mercer Island Lid from 10 p.m. Saturday to 10 a.m. Sunday to test the fire suppression system in the tunnels. Drivers will use the express lanes to get across Lake Washington.