Interesting article, thanks for posting.
Well ain't I the lucky one. I've long chaffed about the CA 55 while towing speed limit and since I drive the length of CA it's especially irritating. But now I find out that CA is the only state with this silly limit.
I'm much more comfortable towing somewhere over 60 but every mph over 60 likely increases the chance of getting a ticket.
So I stick to 60ish, all the while most trucks go flying by me.
We had several spped limit wars on a local road. Seems traffic studies show that if an unrealistic speed limit is placed on a road that traffic will flow at a speed that the public deems reasonable. I think that's pretty close to the CA situation.
Ron