You know, the law banning kids from driving vehicles that can go over a certain speed is also already on the books. The new law is just a clarification that no, you can't be an 11 year old going 40 MPH with an unlicensed E-bike.

The big problem is just Seattle being incredibly underpoliced and really no laws under homicide are really enforced or punished.

It's legal in Oregon and Montana as long as you stay in the shoulder. You can walk there too. I can't remember the law in Washington.

In western states with a lot of rural places only serviced by interstate they sometimes never passed blanket prohibition against non-motorized traffic on the interstate property.