Yah, and I know the stretch of road she's describing. It's straight freeway, four lanes either side, and people routinely drive it between 55 and 80. I can't remember about WA, but I think part of it's posted 70.
I've also experienced the "how do I remember how to drive?" phenomenon that occurs after a week in the woods making music. I usually err on the side of too slow, however.
Blessings,
Barbara