 Northwest traffic from the High Performance Homes Traffic Center. Heavy traffic down in Puyallup. Meridian is backed up from the fairgrounds to the Puyallup River. But the big story this weekend is that 405 is completely closed from Renton to Factoria. So lots of people are heading through downtown Seattle as an alternate route. Northbound I-5 is busy from the West Seattle Bridge to Eastlake. Westbound I-90 is backed up to Mercer Island. And the Westbound 520 exit to Northbound I-5 is closed this weekend as well. So Westbound 520 is stop and go around Montlake Boulevard.