The Seattle Department of Transportation (SDOT) is again closing down the Mercer Street on and off ramps to I-5 this weekend, from 11 p.m. on Friday, July 22, to 5 a.m. on Monday, July 25, to do some construction work related to the Mercer Corridor Project.
SDOT will also be concurrently closing all lanes on Broad Street between Westlake Ave N and 9th Ave N during the same times. Crews will be taking advantage of the anticipated reduced traffic volumes due to the Mercer closure during this time to perform some storm drain work in the intersection of Broad Street and 9th Ave N. From SDOT:
Travelers who planned to use westbound Broad Street over the weekend will be detoured to southbound Westlake Avenue N to Denny Way for access to the Seattle Center and downtown Seattle, or to northbound Westlake Avenue N to 8th Avenue N for access to lower Queen Anne and Dexter Avenue N.
As with previous weekend ramp closures, the I-5 on-ramp at University Street will be concurrently closed to provide more efficient traffic flow around the closed Mercer Street exit lane on I-5. Fairview Avenue N will also be closed between Mercer Street and Valley Street, and Mercer Street will be closed to through traffic between Westlake Avenue N and Fairview Avenue N.
Updated detour route maps are available on the project website at: www.seattle.gov/Transportation/ppmp_mercer.htm. Detour routes will be signed on roadways and may be heavily used, particularly Denny Way in both directions. Travelers are advised to consider alternate routes, SR 99 or alternate I-5 exits and entrances, and to carpool or use alternate modes of transportation.