The new diverging diamond interchange, where I-90 meets SR 18 in Snoqualmie, was supposed to improve the massive delays drivers have experienced there almost every weekend in the past. Ten months into the change, the delays are still there, and one sign might be to blame.
Getting rid of the two-mile backup on westbound I-90 to westbound SR 18 was one of the key selling points of the new interchange, but those backups haven’t gone away.
“I’m hopeful, with the two lanes exiting off of Interstate 90, that’s going to take some of the congestion off of that, as you mentioned, that right lane being stopped as people tried to exit in the past,” Washington State Patrol (WSP) Lieutenant Pete Cozzitorto said in July 2025 when the interchange first opened. “I think with this interchange having more capacity, we’re going to hopefully see a reduction in that congestion.”…