[tdw28210]

Maybe the roadblocks near Asheville are because of the 'shiners? ; )

Here is what the infallible Oracle of Wikipedia say about them:

Jurisdictions that allow sobriety checkpoints often carve out specific exceptions to their normal civil protections, in order to allow sobriety checkpoints. Although the U.S. Supreme Court has found sobriety checkpoints to be constitutionally permissible, ten states (Idaho, Iowa, Michigan, Minnesota, Oregon, Rhode Island, Texas, Washington, Wisconsin, and Wyoming) have found that sobriety roadblocks violate their own state constitutions or have outlawed them. One other state (Alaska) does not use checkpoints even though it has not made them illegal.[12] Montana uses checkpoints frequently.[13] Some states combine their efforts in setting up sobriety checkpoint initiatives, such as Checkpoint Strikeforce, jointly run by Virginia, Washington DC, Delaware, West Virginia, and Maryland[14]