Police Road Blocks they call Safety Check Points
The Constitution does not allow police to stop citizens except in limited situations. One is for safety and to check for the mechanical condition of vehicles. However these safety check points are usually down the road from local bars and set up at midnight.
Nothing Good Happens After MidnightThe check points block a road where you can not go around to avoid. Officers are required to have a plan in advance approved by superiors. The safe condition of the vehicles are checked but really the stops are to look for alcohol.
If you are stopped.There will be a lot of extra officers there to make dui arrests. They have the right to make arrests even if the driving is not impaired and will ask you to take several dui tests. Some are required by the law and most are not. The officers in Virginia are required to tell you. Take only the test required. Be cooperative otherwise. Everything you do or say will be recorded, written down and presented in court. Nothing good happens after midnight.