True, but there are also two other Constitutional uses I had in mind:
1) The implied right to travel anywhere as an essential part of liberty
2) Any motorist on any road being blocked could claim they were on their way to another state, a right expressly guaranteed in The Constitution.
I completely agree with both your points.
I was just pointing out that if one truck is delayed the feds could invoke the Commerce Clause and take it out of state hands. But on reflection, the feds might be just as bad as the states.