Updated October 2, 2026.
A police checkpoint is not automatically unlawful because officers have no reason to suspect a particular driver. Its purpose, operation, and effect on motorists matter. An informational checkpoint can be constitutional, but calling a roadblock “informational” does not settle whether it is lawful.
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This article originally discussed checkpoints during the 2020 COVID restrictions. The guidance below addresses checkpoint law more generally and replaces that time-specific discussion.
When can an informational checkpoint be lawful?
In Illinois v. Lidster, 540 U.S. 419 (2004), the U.S. Supreme Court upheld a brief checkpoint where police asked motorists for information about a fatal hit-and-run that had happened nearby a week earlier. Officers stopped vehicles systematically and spoke with each driver for only a few seconds.
The Court considered the seriousness of the public concern, how the checkpoint helped address it, and how much it interfered with individual liberty. It did not give police unlimited authority to stop drivers for any informational purpose. Each checkpoint still has to be reasonable under its particular circumstances.
The checkpoint’s purpose makes a difference
A checkpoint seeking witnesses to a specific crime differs from one designed primarily to discover ordinary criminal activity among passing motorists. In City of Indianapolis v. Edmond, 531 U.S. 32 (2000), the Supreme Court rejected the suspicionless drug-interdiction checkpoint program before it because its primary purpose was general crime control. A secondary license or sobriety check did not cure that problem.
What does Louisiana law require?
In State v. Jackson, 764 So. 2d 64 (La. 2000), the Louisiana Supreme Court held that the state constitution does not categorically prohibit checkpoints. The case involved an insurance checkpoint. The court identified safeguards for assessing whether the intrusion is reasonable:
- Supervisors or administrators establish the location, timing, duration, and operating rules, preferably in writing.
- Approaching drivers receive safe advance warning and clear indications that it is an official police checkpoint.
- Detention lasts a minimal amount of time.
- Officers use systematic, nonrandom criteria for selecting vehicles to stop.
The court sent the case back for further evidence about the checkpoint’s operation. The decision does not mean that every insurance checkpoint satisfies these requirements.
Can you refuse to stop?
Do not assume that you can drive through a checkpoint because you have not committed a traffic violation. Louisiana Revised Statutes 32:56 requires compliance with lawful police orders directing or regulating traffic. The absence of individualized suspicion, by itself, does not establish that a checkpoint is unlawful.
Approach carefully, follow lawful traffic directions, and avoid sudden maneuvers that could endanger anyone. If you believe the stop was improper, preserve the citation and any available video. Write down the location, warning signs, approximate delay, what officers asked, and how vehicles were selected. Those details can help a lawyer assess the stop and any resulting charge.
Get help with a ticket issued at a checkpoint
A checkpoint challenge depends on the evidence and does not guarantee that a ticket will be dismissed. Keep track of the court date and response instructions while you obtain advice.
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