All traffic laws are state-by-state (or even more local) in the US, in general. In practice, according to https://en.wikipedia.org/wiki/Turn_on_red#North_Ameri

All traffic laws are state-by-state (or even more local) in the US, in general. In practice, according to https://en.wikipedia.org/wiki/Turn_on_red#North_America https://en.wikipedia.org/wiki/Turn_on_red#North_America everywhere in the US has had right turn on red unless otherwise signed since 1980. Except for New York City, apparently...