Mercer Island intersection work to begin as early as May 17

Publish Date
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Sound Transit and its contractors will begin work to improve four intersections on Mercer Island ahead of the scheduled June 3 closure of the center roadway express lanes. These improvements are to prepare the region for the opening of the new I-90 mainline HOV lanes and the closure of the center roadway HOV lanes. Crews will work at four locations:

2017 Mercer Island traffic improvement map.

Project details

Start date: As early as Wednesday, May 17.

Work hours: Crews will work from 7 a.m. to 10 p.m., Monday – Friday; 9 a.m. to 10 p.m. Saturday and Sunday. Limited overnight work may also occur.

Duration: Work is expected to take approximately four weeks. Some work is weather dependent and the schedule may change.

What to expect:

  • Crews will be restriping lanes, installing traffic signals and traffic cameras, adding a transit bypass lane and converting existing ramps for metering.
  • Crews will dig trenches in WSDOT planted areas to install conduit.
  • Temporary parking restrictions will be in place up to 24 hours before work begins near work areas.
  • Crews will work in the existing right of way with traffic control in place. Please follow the direction of flaggers and signage to safely access your destination.
  • Cyclists and I-90 trail users should follow detours and construction signage to access your destination.
  • Crews will complete this work in a compressed schedule to minimize local traffic impacts. Limited overnight work may occur.