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Departments : Point of Law

Vehicle Checkpoints

Properly run, they can be useful tools, but only for limited purposes.

November 01, 2011  |  by Devallis Rutledge - Also by this author


Holiday season often means checkpoint time, so let's review the legal principles that may apply. Most vehicle stops are directed at particular vehicles, based on reasonable suspicion of violations of the law by particular occupants. Checkpoint stops are different-multiple vehicles are stopped one after the other, at the same place, without any suspicion beforehand that anyone in particular may be engaged in unlawful activity.

To justify this kind of wholesale detention under the Fourth Amendment requires both a compelling purpose and strict compliance with procedures that confine police activity to the accomplishment of that purpose. To date, the U.S. Supreme Court has indicated constitutional approval for only five kinds of checkpoints and has expressly rejected another.

Drivers License Checkpoints

In Delaware v. Prouse, a patrol officer made random vehicle stops along the highway to see whether drivers were licensed. The Supreme Court ruled that such stops violate the Fourth Amendment because they single out individuals for detention without any particularized suspicion of wrongdoing. In so ruling, however, the court commented that agencies could "develop methods for spot checks" if a neutral formula were used to determine which cars were stopped, rather than leaving this decision to the discretion of individual officers. For example, if officers stopped every vehicle, or every other vehicle, merely asked to see license and registration documents, and allowed licensed drivers to proceed after a very brief detention, the Fourth Amendment would not be violated.

The court gave its approval of such a stop in a narcotics case stemming from the plain-view seizure of drugs at a license checkpoint in Texas v. Brown. Clifford Brown was stopped around midnight by officers of the Ft. Worth Police Department, conducting "a routine driver's license checkpoint." During the stop, officers saw balloons of heroin in plain view in the car and, after arresting Brown, they found even more drugs and paraphernalia during an impound

On Brown's appeal from his conviction, neither he nor the court made an issue of the validity of the initial stop, focusing instead on application of the "plain view" doctrine. Upholding Brown's conviction, the Supreme Court noted that the state courts "did not question the validity of the officer's initial stop of appellant's vehicle as a part of a license check, and we agree." (Texas v. Brown)

Sobriety Checkpoints

Michigan State Police established a highway sobriety checkpoint at which every vehicle was stopped to see if drivers showed apparent signs of intoxication. If not, they went on their way (usually in 25 seconds or less); if they appeared impaired, they would be directed to the side for further investigation. Rick Sitz and other motorists challenged the legality of the checkpoints.

Examining the state's compelling need for sobriety checkpoints, the Supreme Court looked to statistics on deaths, injuries, and property damage caused by intoxicated drivers and said, "No one can seriously dispute the magnitude of the drunken driving problem or the States' interest in eradicating it." Balanced against the minimal intrusion on motorists passing through the checkpoints, the Supreme Court had no difficulty in finding that public safety concerns justified the brief detentions.

The court noted that checkpoint locations were chosen under predetermined guidelines, uniformed officers stopped every approaching vehicle, stops were very brief and police activity was limited to the detection of impairment (unless evidence of other wrongdoing appeared), and two of 126 questioned drivers were arrested for driving under the influence. The court held that the operation of the sobriety checkpoint in this case was "consistent with the Fourth Amendment." (Michigan v. Sitz)

Witness Checkpoints

One case, Illinois v. Lidster, concerned the constitutionality of setting up a checkpoint to try to locate witnesses to a recent, serious crime. An elderly bicyclist was killed by a hit-and-run driver just after midnight on a Saturday on a particular roadway. One week later, at the same place and time, officers set up a "witness checkpoint" to pass out fliers requesting information from potential witnesses who might be repeating the route from a week earlier, and might have seen something. Robert Lidster drove up to the checkpoint under the influence of alcohol and was arrested at the scene. He moved to suppress the evidence of his impairment on the ground that the checkpoint stop was unlawful.

The Supreme Court applied the same kind of balancing test it had used in Brown and Sitz, and found the checkpoint justifiable. The court said that the concept of criminal suspicion was inapplicable to an effort to get the public's assistance in an investigation of an earlier crime: "The stop's primary law enforcement purpose was not to determine whether a vehicle's occupants were committing a crime, but to ask vehicle occupants, as members of the public, for their help in providing information about a crime in all likelihood committed by others." (Illinois v. Lidster)

Border Checkpoints

Immigration officials operating near our international borders are not allowed to make random stops of vehicles, except based on reasonable suspicion that a particular vehicle or occupant may be breaking the law. (Almeida-Sanchez v. U.S.) But the operation of fixed checkpoints at or near the border is allowable when conducted with the same kinds of features used in other checkpoints, including signs alerting the public to the purpose of the checkpoint, a neutral formula for deciding which vehicles will be stopped, use of lighting and uniformed officers to reduce motorists' anxiety, and release after brief screening, unless initial observations justify referral for secondary screening. If such guidelines are followed, said the Supreme Court, "Stops routinely conducted at permanent checkpoints are consistent with the Fourth Amendment and need not be authorized by warrant." (U.S. v. Martinez-Fuerte)


In Indianapolis v. Edmond, the Supreme Court rejected the use of checkpoints solely for the purpose of trying to catch drug traffickers. The court thought a checkpoint that allowed an opportunity for a K-9 sniff of every stopped vehicle was an unjustifiable intrusion on liberty and privacy interests, and unlike the sobriety checkpoints approved in Sitz, was not aimed at enhancing public safety by removing dangerous drivers from the roads. The court's reasoning was expressed as follows:

"We have never approved a checkpoint program whose primary purpose was to detect evidence of ordinary criminal wrongdoing. Rather, our checkpoint cases have recognized only limited exceptions to the general rule that a seizure must be accompanied by some measure of individualized suspicion." (Indianapolis v. Edmond)

The court was careful to add, however, that traditional roadblocks erected to nab escaping criminals or those thought to pose an imminent threat to public safety would not be invalidated by the Edmond ruling. Said the court, "The Fourth Amendment would almost certainly permit an appropriately tailored roadblock set up to thwart an imminent terrorist attack or to catch a dangerous criminal who is likely to flee by way of a particular route."

Devallis Rutledge is a former police officer and veteran prosecutor who currently serves as special counsel to the Los Angeles County district attorney. He is the author of 12 books, including "Investigative Constitutional Law."

Checkpoint Protocol

  • To date, checkpoints have been approved to check for driver's licenses, sobriety, witnesses to a recent serious crime, and immigration compliance. Approval has also been suggested for targeted roadblocks.
  • Checkpoints are not allowable to interdict narcotics transportation.
  • Neutral selection and standardized criteria must be followed for all checkpoints.

Comments (9)

Displaying 1 - 9 of 9

John Russell @ 11/1/2011 4:11 PM

Bottom line NO ROAD BLOCK NOR ANY CHECK POINT should be allowed in all USA STATES unless Law Enforcemnet has absolute direct knowledge or evidence that such a vehicle is engaged in any crime or is an endangerment to any citizen or poppulus ...agree or not?

Lee @ 11/1/2011 8:16 PM

@ John Russell: I don't agree at all actually...Check points for DUI in cities and counties where drunk driving is a huge problem is only helping the population by removing people who feel they can drive in an impaired state and can possibly ruin some one elses life. How is that a bad thing? some person can go on living because the DUI that was heading straight for them is no longer on their path of destruction...Road blocks; like stated in the article, "roadblocks erected to nab escaping criminals or those thought to pose an imminent threat to public safety", are not used on a weekly basis and are only to assist an agency in containing a certain individual(s). That does not strike me as being a violation to any amendment. And btw, "absolute direct knowledge or evidence"? Pretty sure there is something out there called reasonable suspicion, which allows a TS or PS without direct knowledge of any crime. Now I am ranting...

Jesse @ 11/1/2011 10:41 PM

@ Lee, I agree with you, and further more. Driving is a privilege NOT a right. Making sure people are in compliance with the traffic laws, i.e. DL check point or sobriety check point is not a violation of your rights when you are a driver of a vehicle which again is not a right but a privalage.

I wholeheartedly agree though that criminal check points, such as interdiction which was mentioned here, are a violation of rights, since it does not involve the privilege of driving, but instead the rights of unreasonable search and seizure and the rules that apply to all criminal investigations.

Rick @ 11/2/2011 8:59 AM

The part about Border Checkpoints is incorrect. Courts have upheld that Border Patrol can make vehicle stops on cars that have "brown" people in them. I have seen Border Patrol here in the Coachella Valley (CA) do so along I-10. How they can tell that a Hispanic looking person is illegal at 70mph is beyond me. If they'd stop the traffic stops and go by the numerous landscaping companies around the valley, 1/2 of the landscapers would be going home to another country.

William @ 11/3/2015 6:18 PM

John Russell is correct in his observation. These warrantless and suspicionless roadblocks (including the border patrol inland checkpoints 100 MILES from on of our international borders...) are Constitutional violations based most times on the agents (or officers) "CLAIM" that he smelled marijuana, watery eyes..

First, I would appreciate it if Rick would include standing case cites referring to the color of vehicle occupants being grounds for stop, detention and search. Next, if Jesse would check the legal terms defining the terms "driving" and what means of travel is being used by the individual stopped, he would find that "driving" is a "privilege", but only to vehicles of commerce and not for citizens traveling down the road...this is called "freedom of movement" Jesse and does not warrant the reason for the stop. If a traffic stop is being examined for "reason" of "violation", this cannot be done without "reasonable articulabe suspicion" and not based on a "hunch" of wrongdoing.

Ruko @ 11/28/2015 2:27 PM

Our supreme court has been crapping all over our constitution for quite a while now. License and sobriety check points "if done correctly" are constitutional according to the court. To heck with probable cause.

Keith @ 10/12/2016 3:13 PM

How can the police handle a person who is driving an unlicensed/unregistered private automobile without a license. Remember that t license is a permit to perform commercial activity on our roadways and a man/woman using the roads privately for their own enjoyment would not need a license to do so.

oren buckmaster @ 10/18/2016 12:48 AM

Timely ideas , For what it's worth if you require a GA Citizen\'s Guide to Filing Appeals , my business partner edited a sample form here <code></code>.

Tammy Landry @ 10/23/2016 1:01 PM

I want to know the laws on checkpoints in Louisiana.

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