The only things I've seen that causes complete gridlock in Seattle were a freak snowstorm/ice at 3pm, a butane truck closing i5 and major arteries downtown and

The only things I've seen that causes complete gridlock in Seattle were a freak snowstorm/ice at 3pm, a butane truck closing i5 and major arteries downtown and Obama. And Obama wasn't that bad most of the time. But those were literally no one can move anywhere nor can people reparj and stop. This is know and plannable. Seattle has a remarkable amount of work hour flexibility in the short term. They closed 90 a few years back for a week, asked 50k to stay home and iirc got around 110k who did.