They haven't put in any road diets in Seattle and the cops aren't enforcing traffic laws so everyone just drives the way they used to. So you've got 25 mph limits on 4-lane stroads with no pedestrian traffic (like literally no sidewalks in one case I can think of) and everyone does 45 mph.
It looks like they're going to start using speed cameras now instead of police enforcement (they certainly don't want to use police enforcement here, that would clearly turn out badly). They're trialing "racing cameras" to supposedly catch the kids drag racing at night, but it is obviously a way to introduce enforcement of the 25 mph limits without doing road redesign and to generate revenue.
The result is pretty obviously going to be regressive taxation, because Seattle/Washington State runs everything via regressive taxation. So the traffic cameras are not being setup on W Seattle Bridge to catch white collar people commuting to the office, but are put on W Marginal Way which are going to catch blue collar workers.
I'm just waiting for liberal Seattle to wake up one morning and realize the DOT is funding their bike lanes by regressive taxation through traffic camera enforcement, falling on the lower class and minorities, and see if their heads explode or not.
There's a way to do it right like Amsterdam where they've already built all the infrastructure and done all the road diets, we're doing it the ass-backwards way by dropping the speed limits and setting up traffic cameras.