I did think it was interesting that on our trip to Seattle, for the first time, I noted WiFi signs at the rest stops on Interstate 5. I believe there are three in each direction between the border and the city.
Now, as well as a trip to the restroom, it's possible to check out the winter pass information for free. The whole web is not actually free but the following sites are provided gratis:
Access is made available through a private company closely connected with www.coachconnect.net, so it is possible to buy time with a credit card. It is well designed for the RV crowd at $30/month and at the present a $2.95 tariff for 15-minute access would be useful for emergency email. Bear in mind, often these rest stops may be miles and miles from an exit.WS DOT Home Traveler Information (cameras) Travel Alerts and Slowdowns Construction Updates Weather Mountain Passes Accountability Washington Tourism