The jackasses driving the farm machinery just don't follow the laws. I don't know if they're ignorant of the laws or just too inconsiderate to care. I hate to see more regulation - just the same as anyone else, but years of following idiots driving farm machinery, almost getting killed by idiots driving farm machinery (running stop signs), and occasionally getting run on to the shoulder by idiots driving farm machinery has reduced my sympathy toward them to about zero, and I suspect that A lot of other people won't be very sympathetic to them for the same reasons.
Well then change your route! No different then one we get behind school buses. Know their route and adapt yours if it troubles you so much.
Having driven farm machinery on public roads for over 50 yrs (I’m 57, and started on just the gravel/township roads at the age of 6 yrs old, graduating to the state and US highways @ 16), I can tell you that, as much as any other reason, INSURANCE and the danger of LAWSUIT keeps farm machinery in the lane.
To pull over enough to clear the lane ENTIRELY usually requires an intersection large enough to do just that. I’ve had people try to pass just because I’m only using half of the lane (to keep the right steering tire from running on the edge of the pavement, for safety and to keep from breaking the edge on asphalt roads). These people think that because I’m over SOME, they can squeeze by, straddling the centerline and squeezing oncoming traffic off the road.
I’ve seen absolute imbeciles, who have the acceleration ability to pass a farm tractor very quickly, just follow and follow when they’ve been given a half mile of clear oncoming lane.
People are supposed to know the the SMV sign indicates a slow moving vehicle, and that it does not have the ability to speed up and make passing it difficult like trying to pass a teenager with a muscle car (I know this because I was a teenager w/musclecar. heh heh).