I-90 - Medical Lake Interchange Improvements

What to expect

The SR 902/Medical Lake Interchange Reconstruction project is located at the existing Highway 902 Interchange at exit 272 along I-90. The project includes the construction of - 

  • A temporary speed limit reduction has been removed. No further work along I-90 will require the reduced speed limit.
  • A new parallel bridge over I-90. This will allow two lanes of traffic in each direction along with the construction of a shared use path for those who bike or walk.
  • Build three multi-lane roundabouts
    • Two will be constructed at the east and west on and off-ramps to I-90.
    • A third roundabout will be constructed at SR 902 and Geiger Blvd.
    • Each roundabout will be built in phases to allow traffic to move through the area without significant closures.
  • Modifying three of the four ramps to and from I-90.
    • Westbound off-ramp will extend the length of the ramp to increase safety.
    • Eastbound off-ramp will create a bus-only lane into the recently opened Spokane Transit Authority (STA) facility.
    • Eastbound on-ramp will be widened to accommodate an additional lane for future ramp metering.
  • For people using bicycles or those walking and rolling (assistive devices, wheelchairs) a shared use path will be constructed to connect to the STA facility. The shared use path will also connect into Spokane County's path that will be constructed along Geiger Blvd. to the north of I-90.

The project has been awarded to N.A. Degerstrom, Inc.

Needs & benefits

The existing ramp terminal and intersection at SR 902 currently see traffic volumes that exceed their ability to function properly. With the addition of the new Amazon fulfillment center, the congestion at these locations will continue to deteriorate and back up traffic in the area. The addition of the roundabouts will accommodate the increased traffic and allow for the interchange to operate more efficiently over the next 10-20 years. The modifications to the interchange on and off-ramps will increase the safety of the interchange.

The shared use path will allow people walking or using a bicycle to move through the area without inconvenience.


Construction will begin June 24, 2019, and was complete on June 21, 2021. Punchlist items remain along with cleanup of the site.

View current construction and traffic impacts.


Financial Data for PIN 609047C
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $1,250
CWA $19,913
Total $21,163


Mark Allen, project engineer
WSDOT Eastern Region
2714 N. Mayfair
Spokane, WA  99207
(509) 324-6232