I-90/SR 18 Diverging Diamond Interchange Makes Debut

The I-90/SR 18 Diverging Diamond Interchange near Snoqualmie, WA debuted in 2025 to improve traffic flow and safety. The innovative interchange pattern allows for smoother crossings and fewer potential collision points. The $188 million project also includes widening SR 18 and removing fish barriers....

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Sep 16, 2025 - 18:30
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The I-90/SR 18 Diverging Diamond Interchange near Snoqualmie, WA debuted in 2025 to improve traffic flow and safety. The innovative interchange pattern allows for smoother crossings and fewer potential collision points. The $188 million project also includes widening SR 18 and removing fish barriers....
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