City of Mercer Island, Washington - Home City of Mercer Island, Washington - Home Facebook Twitter YouTube
site map
Back to City and Regional Projects

Operating & Capital Financial Challenges
Light Rail (East Link)
I-90 Issues
R8A: Adding HOV Lanes
I-90 Tolling
I-90 Document Archive
Sound Transit Park-and-Ride
Residential Development Standards Update
Mercer Island Center for the Arts (MICA)
Capital Improvement Program
Street, Pedestrian & Bicycle Facilities
Transportation Improvement Program (TIP)
Transportation Benefit District
Renton Municipal Airport

Calendar Events
RFPs & Bids

9611 SE 36th Street
Mercer Island, WA 98040
Phone: 206.275.7600
Fax: 206.276.7663
Notify me by Email
I-90 Today and in the Future


Lacey V Murrow Bridge 1940
Mercer Island is in a unique position as the only City in the region where its citizens' sole means of ingress and egress is by access to an interstate highway.  According to WSDOT 2016 data, on an average weekday, the daily vehicle volumes on the I-90 floating bridge between Mercer Island and Seattle are:
Eastbound: 69,900 veh/day
Westbound: 72,800 veh/day
Reversible: 15,200 veh/day
Total: 157,900 veh/day

The I-90 bridge is actually composed of two parallel, named structures, built at different times. The Lacey V. Murrow Memorial Bridge, which now carries the eastbound lanes from Seattle to Mercer Island, was originally completed in 1940, then sank during refurbishment, and was rebuilt in 1993. The westbound traffic, and the reversible express lanes, are carried by the Homer M. Hadley Memorial Bridge, completed in 1989.
Read a Seattle Times overview of the 30-year process leading to the widening of I-90 and the addition of the "Lid" on Mercer Island.  Learn more about general bridge history.

Light Rail

When the construction of East Link Light Rail begins in mid-2017, the center roadway floating bridge carrying the reversible express lanes will be closed permanently to vehicles in order to become the light rail corridor between Seattle and Eastside.
Learn more about changes to I-90 vehicle access here.
Learn more about light rail on Mercer Island here.

General Council Presentations on I-90

For 2016/2017 updates:
  • Learn more about future I-90 vehicle access here
  • Learn more about future light rail on Mercer Island here

January 7, 2013

February 4, 2013

February 25, 2013



City of Mercer Island Washington | All Rights Reserved 2019| Privacy Policy | printer friendly version Printer friendly version | Site Handcrafted in Ashland, Oregon by Project A