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9611 SE 36th Street
Mercer Island, WA 98040
Phone: 206.275.7600
Fax: 206.276.7663
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City of Mercer Island / City and Regional Projects / Light Rail (East Link) / Construction & Commuter Information

Helpful Information for Commuters

NOTE: On June 3, 2017, the Washington State Department of Transportation (WSDOT) permanently closed the I-90 center roadway to all vehicles in order to allow construction of the East Link light rail line.

This closure also changed some I-90 access ramps on Mercer Island: the reversible ramp at
77th Avenue SE closed permanently, and the westbound on-ramp via the tunnel at Island Crest Way is now restricted to HOVs only -- this means that SOVs must use an alternative on-ramp.

Exploring new transportation alternatives will help commuters avoid traffic or parking hassles. The Park & Ride on North Mercer Way now fills by 7:00am on weekdays.

City of Mercer Island I-90 Light Rail Information Brochure
View a copy of the mailer sent to all Island households and businesses (May 2017)

Resources for Commuters
Stay Connected Construction Info 
  • Sound Transit's construction hotline is (206) 398-5465; the after-hours hotline: 1-888-298-2395
  • Sound Transit's intended construction hours in general will be 7:00am-5:30pm Mon-Sat
  • Sound Transit's Community Outreach Specialist is Zack Ambrose (

Additional Parking Options for Using Transit
  • NEW (4/23/18)! The City has launched a discounted ridesharing program with Lyft & Uber to/from the Park & Ride. Avoid parking hassles and leave your SOV at home.
  • The City's TripPool van partnership w/Metro - discontinued June 2018
  • Metro also has a new, off-site pilot paid parking program at the Aviara Building
  • The City has on-street commuter parking permits (Town Center) for residents only
  • As many bus riders already know, the existing Sound Transit Park & Ride now fills up by about 7:00am on most weekday mornings; the City is working on identifying other parking stalls in the area that may be available by lease.

Changes to Ramps (Starting June 3, 2017)
Changes to North Mercer Way
  • Map of new traffic control measures installed in May/June 2017



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