Indeed, the limits on my car insurance in the US are $100,000 for Liability, $300,000 for bodily injury and $50,000 for property damage.
To add to the confusion if I drive a couple of miles north and have an accident I'm in South Carolina where the law is different. If I actually moved house a couple of miles north I'd have to re-register my car, turn in my Georgia Drivers license and get a South Carolina one.
So my driver's license is a State one and my Pilots license is a Federal one - go figure. As neither the licenses or the vehicles they cover were invented when the Constitution was written it's all a bit of a mystery to me (a non-resident alien who is nevertheless legally residing in the US and is a US taxpayer).