Trust me the regulations to keep the roads safe are already out there. More regulations are not the answer.
The problem is that people dont always follow them.
Some driver wants to make a big paycheck hauling a heavy load but doesnt have the trailer to handle it takes back roads to avoid the troopers and drives over bridges not built to handle the weight. Those bridges are damaged as are the roads he took.
Just as with fire arms trucks can be deadly in the hands of those who dont care about the laws and no law can stop them.
You make a good point about semis using roads that weren't built for them. It's gotten pretty common around here, but I have to admit I totally get it. The interstate entrance/exit near here is such a mess that I do the same route they do to avoid it!