Can we put this misinformation to rest already?
It's advisable to quarantine, not required. I don't think any state has made it a law requiring it, IMO, something about civil rights and the pandemic is not as life-threatening as news organizations and social media is making it out to be.
From the NJ site
(underlines are my doing):
New Jersey welcomes travel to and from our state.
However, to save lives and prevent the spread of COVID-19, the State has issued an incoming travel advisory that all individuals entering New Jersey from states with a significant spread of COVID-19 should quarantine for 14-days after leaving that state.
Under the 14-day quarantine travel advisory announced by the Governors of New Jersey, New York and Connecticut, individuals traveling to or returning to New Jersey from states with increasing rates of COVID-19 are advised to self-quarantine for 14 days. This includes travel by train, bus, car, plane and any other method of transportation.