Tude:
I have had time in the USA this last few days and the speeds of the trucks over there has been astonishing, but at the same time completely safe in my opinion.
I had my cruise set at 80 MPH and still had heavies come past me, one of them had three trailers on
Now they can get a bit of a weave on going around a bend downhill, but largely it is not a problem and obviously they can average far more miles that we could ever wish to in Europe.
So, it got me thinking…I have been to China a few times in recent years and I would say that the USA is more regulated than China in many respects and the people have fewer freedoms, but then when you look at this and look at how we do it…It is more than worrying that we are more regulated and prohibited in what we can do compared to these two countries!!! 
We are truly regulated and confined in regulation to the extent that once you have ventured outside of the EU, you truly realise just how much we are suffocated by legislation and bureacracy big time…It ain`t even funny.
EU is worse than communist China and the Trump led US of [zb] A!
In a word, we are totally forked.
Things are not quiet as they appear as I discovered first hand over there a few years back.
Speed limits are generally 65 to 75 in most states with some more densely populated states and California operating at 55 mph. Pay is generally per mile for drivers with a significant fuel bonus for company drivers so going flat out can be expensive for most.
The only impressive thing about their conventionals was how stable they were at high speed and how easy it was to take them through the eye of a needle flat out.
I guess that was because you were sat low and close to the centreline of the truck. The cabs are very small and narrow so it’s like being sat in a Transit van. Then they simply bolt on a usually decent sleeper pod at the back of the day cab for the trampers.
The biggest problem is the brakes on the US wagons were useless, you had a better chance of stopping a supertanker on time.
What very few realise is those big flash looking US wagons are limited to 36.3 tonnes max
regardless of whether it is a single, double or triple trailer so EU wagons are far mor productive.
Some individual states allow higher weights provided you remain within that state and don’t use interstate highways.
No overall length requirement but max trailer length is 53 feet (16.2 m) and max weight is always 80,000 lbs (36.3t) and the driver has to be real careful to sort out the individual axle weights at a nearby scales before he hits the long road or he will have serious fines coming his way.
The US limits iirc are based on the bridge laws used to design the Interstate Highway system in late 50’s and 60’s. Federal highways are the ones that the Washington (Federal) Government gave financial aid to the State governments to build the countries main arteries.
My understanding was that all bridges had to be capable of a particular maximum weight on any single bridge span at any one time. That is why the axles have to be so far apart with maximum axle limits to limit the max weight on any single span at a time and of course the overall limit of 36.3t.
When it comes to legislation big business is very well looked after. Almost all the fines are for the driver rather that the company.
Being paid by the mile, Post Office mile at that, to go coast to coast in the winter ice and snow could take 3 or 4 times as long but you are only paid by the mile so you are loosing money big time. Of course driving for days at 25 mph blows your fuel bonus out the window to add insult to injury.
I found the country to be massive and relatively boring by comparison to European work. The trucks were fast but years behind European trucks in performance and comfort. Even the mirrors were too narrow to shave yourself with in the early 90’s and weren’t even heated and the back of your trailer was about 3 miles away. 
Mind you the trucks had some very clever ideas from the company’s perspective but still very basic from a drivers standpoint.
It was a poor to average paying job for the hours worked in my experience with a descent sized interstate firm with serious supervision/harassment from law enforcement if on long distance work.
Some super truck stops in the US though but give me the European legislation over the US legislation any day.