States can, and do, maintain the power to maintain or close public roads. In fact, they do so daily at border checkpoints, and do so locally in cases like local natural disaster risk (e.g. hurricane or wildfire evacuation).

Or in the case of local social disaster risk, like, say, riots, protests, or public gatherings.

It doesn’t even need to be a disaster.

A parade or block party closure is a closure of a public road, so is closing the street and digging a tunnel.