See quite a few Oversize Overweight units on the interstates so long as stay below 14' or 15' depending on the road, Junkyard has dragged His share around MO.
One of my First ever Mack STL road calls was for Gateway Ready Mix Maryland Heights MO. Had a Brandy New 1977 DM800(Found my notes) with a V8 someone noted was Uprated to 560 hp, had tootsie rolled the forward drive shaft. Saw the truck delivered but had not seen it close up until that day. Tri-Drive on rubber ride, 20K steer axle dual steer, 24? yard dump box could have been 30 as was at least 18 if not 20' long bed. Behind that a tandem Joe Dog to a tri axle 34 or 36' frame style dump trailer. Average Gross weight coming out of West Lake Quarry was 167,000. Drove Under I-70 but never on it to climb Creve Coeur Park Hill and hang a left onto Dorsett Road, NEVER did the driver achieve 45mph before had to slow for a stop. Had to have a shaft made for the New truck on its third DAY at work, that one made by Plaza Fleet Parts, it lasted two weeks and was BACK twisted like a bread tie. Next one to go in was either Schedule 80 or 120 Pipe cut and lathe fitted by Nooter Boiler Works STL took TWO of us to wrestle into and out of the service truck and BOTH to hang ONE end at a time, had the massive Rockwell bolted Cap U-joints. Far as I know a few busted joints but NEVER ever a shaft again.
Bridge Law, who needs bridge law when never cross one!!