2018 Ram 2500

Stir crazy,

Yes, I can get a fine for being overloaded per say. It will not be because I am over a manufacture limit! It will be because I have not bought enough tonnage. IE in my 1500's case, If I had bought gotten a 6000 gvw plate vs the 8000 I chose, went down the road at 7200 lbs per GM's warranty weight rating, I am 1200 lbs overweight per my paid for registration. "GENERALLY SPEAKING" I would not get an actual ticket. Probably a 10 day up my registration by 2000 lbs to 8000. We buy tonnage here in Wa state by 2000 lbs increments. I had this happen in my dump truck one. Cost to me, $15-20 IIRC. Approximate cost per ton I pay for my trucks. Personal or commercial use. 
I've seen a person or two in Oregon say they got weighed and had to buy a new truck with correct tonnage to pull there RV. I would swag probably they had not BOUGHT enough tonnage for the truck/trailer combo they had to pull their RV. All they really had to do was pay more tonnage on their current truck/trailer combo. BUT the story goes they had too small of a truck!
A vehicle with a gcwr of 12K with a V6 vs a V8 at 15000. The V6 rig at 15000 is no less or safer than the V8. OTHER THAN it can pull grades faster!  Or it might be able to pull a steeper grade in 1st grade with-out stalling. Then again, as I have had rigs with BIGGER Motors get out pulled by rigs I've owned with smaller motor, due to lower overall gears in axel and transmissions, allowing them to pull a steeper grade without stalling. 
Above hence why a GCWR is a performance rating. WHAT is the spec that this rating meets? What I want the truck to do, vs you, vs an engineer at the manufacture? OR how much does the manufacture want to limit their warranty pay out for parts that break.
I only know of one jurisdiction that truly enforces the manufactures weight ratings, that is British Columbia. IF a US state only enforces the manufactures ratings, then as I've noted many times, that state is not enforcing the "Federal Bridge Laws" which is the truck weight law in our country.  That states federal dollars for road maintenance and new roads can be withheld. This is the engineer spec that LEO/CVEO enforce. What the roads are designed to carry per axle. A state can go higher, ie Wa st if you have a dually you can put 600 lbs per inch width of tire on that vehicle up to 20K lbs per. singles it is 500 lbs. If a state enforces less than 500 lbs, they are going against the minimum std of the FBL. A state can allow more. More damage to the roads can occur.
With ALL the above said for who knows how many times I have posted this, an leo/cveo can get you off the road if you are a menace to society. Generally speaking, it can be because of weight only. Brakes are over loaded and do not meet a field test, ie stop on a level from 10 mph in X feet. Battery on the towed rig has a 11.5V or less to activate the trailer brakes. Trailer brakes so not hold the Truck at a stop or at least have all the tires locked up when starting up. I do not know of a law that says the truck has to stop the trailer! These are things that can stop most of us, as we have some time or electric braking system. Surge has other field tests to see if the brakes work etc for the trailer or some laws state "Towed vehicle" meaning a literal trailer or a towed car.

I can give more examples etc of what can get you off the road. Literally being overweight as most of us would think of being overweight is few and far between. Even with semi commercial vehicles.

Marty