I've had 18 wheelers stack up behind me on I-5 and listen to them ***** about G/pa in the motorhome blocking traffic. then they will get in the left lane and try to pass. and just set there and soon there are 50 cars wanting to pass and can't.
Washington and Oregon are no better. Wa. law says 60 mph for all vehicles over 10,000# or in combination. and the highways are posted no trucks in left lane. in many urban areas.
Highway #2 and #20 there are many places that I can not run 65, even with out the towed. simply too many curves, or hills. but I will use the passing lanes.