I-90 Bridge Seafair and Air Show Closures
The Washington State Department of Transportation will close all lanes of I-90 across Lake Washington in order to accommodate air show practices and performances by the Patriots Jet Team at this year’s Seafair festivities during the first weekend of August.
|Boeing Air Show at Seafair Weekend|
The Federal Aviation Administration requires WSDOT to close Interstate 90 to all vehicles, pedestrians and cyclists, eastbound and westbound, mainline and express lanes, between Interstate 5 in Seattle to Island Crest Way on Mercer Island on the following dates:
The bridge will be closed to pedestrians and cyclists up to 30 minutes prior to posted closure times, including West Mercer Way from Roanoke Way to the SE 24th. The bridge highrises will still be accessible to pedestrians and cyclists. However, no one on foot or bike can travel beyond the highrises up to 30 minutes prior to posted closure times.
- Friday, Aug. 2: 1:15 pm - 2:40 pm (Practice)
- Saturday, Aug. 3: 1:15 pm - 2:40 pm (Full show)
- Sunday, Aug. 4: 1:15 pm - 2:40 pm (Full show)
Please be advised that access on West Mercer Way from Roanoke Way to the 2100 block of West Mercer Way will be limited only to residents and their guests. Please alert your guests so they are prepared to provide your address to police in order to drive through this area during the closures.
Mercer Island residents are encouraged to travel off or on the Island one hour prior to and following the bridge closures to avoid traffic backups.
I-90 east of Mercer Island will NOT be closed during the performance, although drivers should note that heavy congestion during these closures often restricts access to the exits.
Which ramps will be closed?
- Northbound I-5 to eastbound I-90 ramp (closed up to 30 minutes prior to show or practice)
- Southbound I-5 to eastbound I-90 ramp (closed up to 30 minutes prior to show or practice)
- Southbound and northbound Rainier Avenue ramps (closed up to 30 minutes prior to show or practice)
- 76th Avenue to westbound I-90 (closed up to 30 minutes prior to show or practice)
- Island Crest Way to westbound I-90 (closed up to 30 minutes prior to show or practice)
- Eastbound I-90 to West Mercer Way (closed up to 30 minutes prior to show or practice)
- East Mercer Way to westbound I-90 (closed up one hour prior to show or practice)
- West Mercer Way to westbound I-90 (up to one hour prior to show or practice)
Will the SR 520 bridge be affected?
The SR 520 bridge will remain open to vehicle traffic and tolls will be collected according to the rate schedule. Drivers crossing SR 520 should expect heavy traffic, significant delays and plan for additional time to cross the lake.
Why does the bridge close before the Patriots Jet Team actually performs?
Before each performance the Patriots Jet Team will be in the air, but will not perform specific maneuvers. The bridge closes because it still poses a safety concern.
How will I know when the road is actually closed?
WSDOT will use variable message signs on I-5 and I-90 to countdown to the closures. They will also use social media such as Twitter to alert travelers. They strongly advise motorists to plan alternate routes in advance. Please do not expect to cross the bridge at the last minute. Congestion and unexpected delays on the roadway may leave you in your car sitting in traffic waiting out the performance.
Who will keep people and vehicles off the roadway during the performance?
WSDOT works with Washington State Patrol to control on-ramps and off-ramps and keep pedestrians off I-90. The Washington State Patrol will open the roadway as soon as safely possible after the Patriots performances are finished. WSDOT’s Incident Response Teams will also patrol SR 520, I-405 and I-5 to keep these alternate routes free of disabled vehicles so traffic will move as freely as possible.
I live on Mercer Island, how will I be affected?
Drivers who need to get around Mercer Island should follow signs for detour routes. Most roads will be open for local access only. Mercer Island residents are encouraged to travel off or on the Island one hour prior to and following the bridge closures to avoid traffic backups.
What if I have a medical emergency and I need to get to Harborview Medical Center or Children’s Hospital?
The center roadway of I-90 is reserved for this purpose. Contact 911 and Washington State Patrol will escort you to the hospital.
What specific regulation forces the closure of I-90?
Horizontal and vertical restrictions are in place to protect motorists from planes, jets, and other aircraft. Teams like the Patriots Jet Team, Blue Angles and the Thunderbirds routinely violate these restrictions. To perform, they must acquire a special waiver. This waiver carries safety stipulations. These stipulations require a large three-dimensional aerobatic box to protect people and property. This rule establishes a so-called “clear zone” that WSDOT must respect. As a result, we must close I-90 during the annual SEAFAIR airshow performances. Additionally, keeping drivers off the bridge while the Patriots Jet Team are in the air keeps drivers from being distracted and prevents collisions on the bridge.
Where can I get more information?