[Treblemaker]

We do. Example from Oregon:

ORS 811.275

(1) A person commits the offense of failure to yield the right of way at an uncontrolled intersection if the person is operating a motor vehicle that is approaching an uncontrolled highway intersection and the person does not look out for and give right of way to any driver on the right simultaneously approaching a given point, regardless of which driver first reaches and enters the intersection.

https://oregon.public.law/statutes/ors_811.275

[devilbunny]

There are a lot of state laws that resemble each other, but there are often subtle differences. My point is that there is no overarching coordination other than maybe AASHTO (which can only make recommendations), and legislators are often only interested in the highway department if there's a contract they can steer to a friend.

[nobody9999]

Similar rules exist in New York as well.

I'd expect they exist in most places in the US.