Every holiday weekend — and plenty of regular weekends — Nashville Metro Police set up sobriety checkpoints on major roads across Davidson County. You turn a corner and see flashing lights, orange cones, and a line of cars being stopped one by one. Most people assume they have no choice but to answer every question, submit to every test, and hope for the best.
That assumption is wrong. You have rights at a DUI checkpoint, and understanding those rights before you encounter one is the difference between a clean drive home and a case that follows you for years.
I’m Nathan Cate, a Nashville criminal defense attorney who handles DUI cases throughout Middle Tennessee. Here’s what the law requires of police at sobriety checkpoints and what it requires — and does not require — of you.
Are DUI Checkpoints Legal in Tennessee?
Yes. DUI checkpoints are legal in Tennessee, but they exist in a narrow legal space. There is no Tennessee statute that specifically authorizes sobriety checkpoints. Their legality comes entirely from case law — court decisions that have carved out the rules for when and how law enforcement can stop vehicles without individualized suspicion.
The foundational case is Michigan Department of State Police v. Sitz, 496 U.S. 444 (1990), where the U.S. Supreme Court held that brief, suspicionless seizures at sobriety checkpoints do not violate the Fourth Amendment, provided the checkpoint serves a legitimate state interest (reducing drunk driving) and the intrusion on individual liberty is minimal.
Tennessee courts adopted this framework and added their own requirements. In State v. Downey, 945 S.W.2d 102 (Tenn. 1997), the Tennessee Supreme Court established a multi-factor balancing test for evaluating the constitutionality of a specific checkpoint. The court held that checkpoints must be evaluated on a case-by-case basis, weighing the state’s interest against the degree of intrusion on motorists.
What this means in practice: checkpoints are legal, but they are not a free-for-all. Police must follow specific constitutional requirements, and when they don’t, the evidence obtained at the checkpoint can be suppressed — meaning it gets thrown out of your case.
Constitutional Requirements for a Valid Checkpoint
Not every roadblock with flashing lights is a constitutionally valid checkpoint. Tennessee courts have established that a lawful DUI checkpoint must meet several requirements. When any of these are missing, a defense attorney has grounds to challenge the stop.
Supervisory-Level Authorization
The decision to set up a checkpoint must come from a supervisory-level officer — not a patrol officer deciding on the spot to block a road. There must be a documented decision by a ranking officer (sergeant or above) to conduct the checkpoint at a specific time and location.
A Predetermined, Written Plan
The checkpoint must operate under a written plan that specifies the location, the time frame, the method for stopping vehicles, and the criteria officers will use. This is not optional — it’s the mechanism that prevents arbitrary enforcement. A checkpoint without a written plan, or one that deviates from its plan, is constitutionally suspect.
Neutral Criteria for Stopping Vehicles
Officers cannot pick and choose which vehicles to stop based on the driver’s appearance, the type of car, or a hunch. The plan must establish a neutral mathematical formula — every car, every third car, every fifth car — and officers must follow it consistently. If an officer testifies that they were stopping every car but the dashcam shows they waved several cars through and stopped yours, that inconsistency is a defense.
Adequate Safety Conditions
The checkpoint must be set up in a way that is safe for motorists and visible in advance. This means adequate lighting, signage, warning cones, and visibility so that approaching drivers can see the checkpoint before they’re in it. A checkpoint set up just past a blind curve on an unlit road is a problem.
Minimal Detention Time
The stop must be brief. The purpose of a checkpoint is to make brief contact with each driver to check for signs of impairment — not to conduct a full investigation of every vehicle. If you are not showing signs of impairment, the stop should last seconds, not minutes.
What Happens at a Typical Nashville Checkpoint
Here is the standard sequence at a Metro Nashville checkpoint:
- You approach the checkpoint. You see signs, cones, and officers directing traffic into a single lane.
- An officer signals you to stop. You lower your window.
- The officer makes brief contact. The officer is looking for signs of impairment: the smell of alcohol, slurred speech, bloodshot eyes, fumbling with documents.
- The officer asks questions. Typically: “Where are you coming from tonight?” “Have you had anything to drink?”
- If no signs of impairment are detected, you are waved through. Total time: 30 seconds to a minute.
- If the officer observes signs of impairment, you are directed to a secondary area for further investigation — this is where field sobriety tests and chemical testing come in.
Your Rights at a DUI Checkpoint
Here is where most people get confused. The checkpoint itself is a legal seizure — you are being stopped without individualized suspicion. But that does not mean you’ve waived your other constitutional rights.
You Must Stop
If you encounter a lawful checkpoint, you must stop. Driving through a checkpoint without stopping is a traffic offense and will result in a pursuit. That said — and this is important — you are not required to drive into a checkpoint. If you see a checkpoint ahead and make a legal turn to avoid it, that is not grounds for a stop. Police cannot chase you simply for making a legal turn before reaching the checkpoint. However, if you make an illegal U-turn, run a red light, or drive erratically while trying to avoid the checkpoint, those traffic violations give officers independent probable cause to stop you.
You Must Provide Your License and Registration
Tennessee law requires you to produce a valid driver’s license and proof of registration upon request during a lawful traffic stop. A checkpoint is a lawful stop. You must hand over these documents.
You Do Not Have to Answer Questions
This is where your rights diverge from what most people assume. The officer will ask you questions — where you’re coming from, whether you’ve been drinking, where you’re headed. You are not required to answer. The Fifth Amendment protects you from compelled self-incrimination, and that protection applies at a checkpoint just as it applies everywhere else.
You can politely decline: “I’d prefer not to answer questions.” The officer may not like it. The officer may press. But you have the legal right to remain silent beyond providing your identification.
You Can Refuse Field Sobriety Tests
Field sobriety tests — the walk-and-turn, the one-leg stand, the horizontal gaze nystagmus test — are voluntary in Tennessee. You cannot be penalized for refusing to perform them. These tests are designed to generate evidence of impairment, and in many situations, the strategic decision is to decline. I discuss this in detail in my post on refusing field sobriety tests.
Chemical Tests Are Different
If you are arrested for DUI and the officer requests a breath or blood test, Tennessee’s implied consent law — Tenn. Code Ann. § 55-10-406 — applies. By driving on Tennessee roads, you have implicitly consented to chemical testing when an officer has probable cause to believe you are impaired. Refusing a chemical test after arrest triggers a separate license revocation. This is a different legal framework from field sobriety tests, and the consequences of refusal are significant.
How Checkpoint Stops Differ From Regular Traffic Stops
Understanding the difference matters for your defense.
A regular traffic stop requires reasonable suspicion — the officer must observe something specific (swerving, speeding, a traffic violation) before pulling you over. At a checkpoint, no individualized suspicion is required. The trade-off is that the checkpoint must be conducted under strict procedural rules.
This creates a unique defense opportunity. In a regular traffic stop, the defense often challenges whether the officer had reasonable suspicion. At a checkpoint, the defense challenges whether the checkpoint itself was constitutional — whether the plan was followed, whether neutral criteria were used, whether supervisory authorization existed. If the checkpoint was defective, everything that flowed from it — the officer’s observations, the field sobriety tests, the breath test — can be suppressed.
I have won DUI cases by proving that the checkpoint plan was not followed. A checkpoint that looks legitimate on the surface can be constitutionally deficient underneath, and the only way to know is to request the checkpoint plan documents through discovery and compare them to what happened on the ground.
Common Checkpoint Mistakes That Create Defenses
In my experience handling DUI cases across Middle Tennessee, these are the checkpoint deficiencies that create viable defenses:
No Written Plan or Incomplete Plan
If the agency cannot produce a written checkpoint plan, or the plan does not specify the neutral criteria for stopping vehicles, the checkpoint’s constitutionality is in question. I’ve seen agencies operate checkpoints based on verbal orders with no documentation. That’s a suppression argument.
Deviation From the Plan
The plan says stop every third vehicle. The dashcam shows officers stopping vehicles inconsistently — waving some through, stopping others who appeared to be targeted. Deviation from the neutral criteria is a constitutional violation.
Inadequate Signage or Warning
A checkpoint that appears suddenly with no advance warning, inadequate lighting, or confusing lane markings raises due process and safety concerns. Courts have considered the adequacy of warning as a factor in the constitutional analysis.
Excessive Detention
If you were held at the initial checkpoint contact for an unreasonable amount of time without any indication of impairment — waiting while officers searched your car, questioned your passengers at length, or ran extensive background checks — the stop may have exceeded its constitutional scope.
No Supervisory Authorization
A patrol officer who decides to set up a roadblock on a slow night, without authorization from a supervisor, has not established a lawful checkpoint. The authorization requirement exists to prevent exactly this kind of arbitrary enforcement.
What to Do if You’re Stopped at a Checkpoint
Practical advice, assuming you want to protect your rights while staying respectful:
- Stop when directed. Do not attempt to drive through.
- Have your license and registration ready. Fumbling through your glove box while the officer watches creates an impression of impairment whether you’re impaired or not.
- Be polite but brief. You can hand over your documents and say very little.
- Decline to answer investigative questions. “I’d prefer not to answer questions” is a complete sentence.
- Decline field sobriety tests. They are voluntary, and the results are used against you. Politely declining is within your rights.
- Understand the chemical test distinction. If you are arrested and asked to submit to a breath or blood test, know that refusal has separate consequences under implied consent law.
- Note the details. The location, the time, whether there were signs, how vehicles were being selected — all of this matters if the checkpoint is later challenged.
After a Checkpoint DUI Arrest
If you are arrested for DUI at a checkpoint, the case is not over — it’s beginning. The checkpoint itself is a suppression target. The field sobriety tests, if you performed them, are subject to challenge based on how they were administered. The chemical test results depend on proper calibration and procedure.
Every DUI case has a procedural backbone, and checkpoint cases have an additional layer of constitutional scrutiny that regular traffic-stop DUI cases do not. An experienced defense attorney will request the checkpoint plan, the officer’s training records, the dashcam and bodycam footage, and the calibration records for any testing equipment.
Frequently Asked Questions
Can I turn around to avoid a DUI checkpoint in Nashville?
Yes, if you make a legal turn before reaching the checkpoint. You cannot be stopped solely for avoiding a checkpoint by legal means. However, if you commit a traffic violation while turning around — an illegal U-turn, running a stop sign, crossing a double yellow line — that violation gives officers independent probable cause to pull you over. Officers positioned near checkpoints are watching for exactly this.
Do I have to answer questions at a DUI checkpoint?
No. You must stop and provide your driver’s license and registration, but you are not required to answer questions about where you’ve been or whether you’ve been drinking. The Fifth Amendment right against self-incrimination applies at checkpoints. You can politely decline to answer.
What happens if I refuse a breathalyzer at a DUI checkpoint?
There are two different refusal scenarios. If the officer asks you to perform field sobriety tests (walk-and-turn, one-leg stand), those are voluntary and you can refuse without penalty. If you are arrested for DUI and asked to submit to a chemical test (breath or blood), refusal triggers Tennessee’s implied consent statute, Tenn. Code Ann. § 55-10-406, which results in a one-year license revocation independent of the DUI case.
Can a DUI checkpoint arrest be thrown out?
Yes. If the checkpoint did not comply with constitutional requirements — no written plan, no supervisory authorization, non-neutral vehicle selection, inadequate signage, excessive detention — the stop itself may be ruled unconstitutional. If the stop is suppressed, all evidence obtained as a result of the stop (officer observations, test results, statements) is suppressed as well. This is called the exclusionary rule, and it applies to checkpoint cases.
Are DUI checkpoints only on weekends and holidays in Nashville?
No, though they are more common on weekends, holidays, and during events (NFL games, CMA Fest, New Year’s Eve). Metro Nashville Police can and do set up checkpoints on weeknights. The Tennessee Highway Patrol also conducts checkpoints on state highways throughout Middle Tennessee. There is no fixed schedule — checkpoints can happen any time, anywhere, as long as the procedural requirements are met.
Does Tennessee publish DUI checkpoint locations in advance?
There is no legal requirement for law enforcement to publish checkpoint locations in advance, though some agencies do announce them on social media or through press releases. This is a public relations choice, not a legal obligation. Whether or not the location was announced has no bearing on the checkpoint’s legality.
Charged with DUI at a Nashville checkpoint? Call (615) 664-8083 for a free consultation.