Most amusing. I live on US 20 in Central NY. US 20 is a major highway that goes all the way across the US, from sea to shining sea. My place is just south of Syracuse, but it is definitely rural - dairy country for the most part. I see farmers driving farm equipment by my house all the time, guys that I know are hauling at least 10 miles one way regularly. Not just tractors, either. I also see, in season, combines, self-propelled choppers, highboy sprayers, and the like, much of it looking gigantic.
State Troopers patrol this road, as well as the County Sheriff. As long as it is folded up not to be too wide, they pretty much ignore the farm equipment, unless, of course, there's an accident. And the infrequent accidents are almost always not caused by the farm equipment.
That said, I have driven a tractor with a 3-point sprayer on the back as far as 5 miles a couple of times, and I was nervous about it every minute. While I have no problem driving the half-mile to my brother's house in the winter to clear his driveway with the snowblower (He bought it, after all...), I don't care for going much farther than that.
43 miles? NO WAY!