MARYSVILLE, Wash. — We're taking a look at the worst of the worst traffic spots in western Washington – and some of the solutions to the problem. Marysville A problem spot in Marysville has city and state transportation officials working to come up with a fix. Interstate 5 traffic between Everett and Marysville gets congested during rush hour. According to the Washington State Department of Transportation, between 1980 and 2017, the population of Snohomish County increased 137%. It's expected to gain another 200,000 residents by 2035. This explosive growth increased the number of vehicles using I-5 between Everett and Marysville,...