Cool, didn't know that, kind of surprising that the US would regulate this, knowing their general stances.

The conditions are quite harsh, compare them with this:

https://europa.eu/youreurope/citizens/work/work-abroad/rules...

Well, it's still far from EU, but it's something. Although rest times are VERY short.

US:

  - max 11h driving after 10h of rest (that sums 21h, so I guess you can drive 14h a day)
  - rest 30min every 8h of uninterrupted driving
  - max 60h driving a week

EU:

  - max 9h driving a day (10h driving allowed twice a week)
  - rest 45min every 4.5h of uninterrupted driving
  - max 56h driving a week. max 90 every two weeks.