There is a Constitutional right to travel. It is an essential part of liberty. When states make it legal for some to deny that right to others, than they should be sued ifor denial of rights under color of law.
“There is a Constitutional right to travel. It is an essential part of liberty.”
I agree.
Then on interstate and US highways the Commerce Clause could be used. Those closing down interstate and US highways are interfering with interstate commerce.
The FedGov uses the CC for everything else.