They also only drive forwards which helps a lot.

When I was a kid on the farm, all the transmissions in the grain trucks were modified so you could only go forward. Too many accidents driving backwards with bad sight lines. Its a strange thing at first but you get used to always parking with a forward exit.

And less of a modification on an older farm -- backing up horses was hard enough that many older farms will already be designed for one-way traffic, with all eg barns allowing you to pull through.

huh, never thought of that before but that makes complete sense. All the farms I ever worked on were newer mostly created out of irrigation projects from the new deal. All mechanical at that point.