They are unconstitutional but that never stopped the Gestapo.
(Fourth Amendment: The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.)
The 4th, along with much of the rest, has been kicked into the ditch. Go after the real criminals: Washington, D.C., Wall Street and City Hall.

Another street lawyer....

Get your facts straight before you post such non-sense. A motor vehicle is one of the 7 exceptions to the 4th amendment requirement Einstein. This one particularly being due to the fact it's mobile.
On site violations do not violate the 4th amendment and check points are often used for seat belt enforcement or front plate requirement enforcement if your state requires it.
If a check point is being utilized for DUI then a specific pattern of cars must be adhered to in order for it to be legal. For example every other car, or every 3rd car, or every car if they choose. Usually not feasable on a busy highway but as long as a particular pattern (Random) is followed then stopping a car to make a visual (Red blood shot eyes), audio (Slurred speech), smell, (Smelling an alcoholic mixed beverage) does not infringe on anyones civil rights.
There are to be announced. That will vary as to exactly how, when and where that will be. Some states require there to be a turn-off before the actual check point.
Driving your vehicle is not a right. It is simply a privilage that comes with certain rules that you must play by. When you take the written and driving exam to operate a vehicle in any state you are agreeing to implied consent pertaining to operating a vehicle while under the influence or drugs or alcohol. Meaning, you
MUST submit to a breath or urine test (And sometimes blood in some states) after being placed under arrest for DUI or there will be certain and immediate consequences if you do not. Those being CRIMINAL not CIVIL.
Those rules are not listed in the constitution.....

Those are rules that
YOU agreed to when
YOU applied.....yes APPLIED for a drivers license. You were not appointed nor did you inherite that driver license. It is a PRIVILAGE that you are given with certain requirements and if they are not met you are subject to arrest and punishment period.
You can committ crimes with vehicles and of course they MOVE which is why they are an exception. They are not houses. So if the Police decide to announce a check point on a particular day to ensure that YOU are following the rules that YOU signed up for then that is exactly what they are going to do. Stopping a car is not searching a car. Learn the difference and maybe you won't sound so ignorant next time....
