Lucky to see one guy in commuter traffic. I need to drive few times per month during commuter hours and in Seattle area there are few types of such unsafe driving:

1. Trucks - not keeping the lanes, speeding (it's 70mph cars and 60mph trucks, trucks bypass me when I'm driving 70).

2. Old company vans and pickups - that's surprising to me, but I frequently see some old Gutter/Plumbing/Heating van darting in an out of lanes. I'd think they'd get fined or in accident sooner or later, but still.

3. Large pickups. They usually are speeding, going in and out of HOV lane closer to Seattle. Never saw HOV enforced on I90.

The enforcement was somehow increased this year, but only until heavy traffic (you can see it daily 5am-6:30am), but never during heavy traffic, which would be more helpful.