So law enforcement is required to have a court decision on whether a particular reason for a roadblock is legal, or does the court just set some general parameters for law enforcement interpretation?
The body of case law carves out the exemptions to Constitutional guarantees such as the right to travel from place to place unmolested, or the right to be secure in your person or papers.
There have been numerous cases of law enforcement using checkpoints for a variety of reasons. The federal circuits and the US Supreme Court have all issued decisions explaining when a roadblock/checkpoint can and cannot be used.
Alaska;
I want your bona fides:
These are simple yes or no questions and you need to answer then all.
Do you own a gun and/or do you support the 2nd amendment as it was written to challenge the authority of government ?
Do you wear a helmet when riding your bicycle ?
Do you have free will ?
Do you think that people need to be TOLD or manipulated to think the right way ?
Do you think you are smarter than most people ?
Do you trust or want to trust authority ?
Are you GAY ?
What do you know that is true ?