What Really Happens During a DWI Traffic Stop in New Jersey
Welcome to Spodek Law Group. If you've been pulled over on suspicion of drunk driving in New Jersey, everything feels like it's happening too fast. The lights behind you. The officer at your window. The questions that seem designed to trip you up. Most people focus on the breathalyzer as the moment that decides their fate. But that's not how DWI cases actually work. The decisions you make in the first sixty seconds of that traffic stop—often before you even understand what rights you have—shape everything that comes after. Todd Spodek and the team at Spodek Law Group have seen hundreds of these cases, and the pattern is always the same: people make critical mistakes because nobody told them the truth about what they can and cannot refuse.
This article is going to walk you through what actually happens during a DWI traffic stop, what the prosecution doesn't want you to know about field sobriety tests, and how the law changed in 2024 in ways that could dramatically affect your case.
The Silence That Convicts You
Heres the first thing you need to understand about DWI stops in New Jersey. Officers dont have to tell you that field sobriety tests are voluntary. Read that again. You cannot be ticketed or penalized for refusing to do the roadside exercises—the walking, the standing on one leg, the following a pen with your eyes. But officers arnt required to tell you that. They ask you to step out of the car. They ask you to perform some "simple tests." And most people, wanting to seem cooperative, wanting to prove there not drunk, just do what there told.
Look, that silence is not an oversight. Its strategy.
The field sobriety tests become the prosecutions primary evidence. Your "performance" on these tests gets written up in a police report that will be used against you in court. Every stumble, every wobble, every moment of hesitation becomes proof of impairment. And you voluntered for it. You didnt have to. But nobody told you that.
The 46% Problem Nobody Talks About
OK so heres were things get realy disturbing. Researchers at Clemson University conducted a study were they videotaped 21 totaly sober individuals—every single one confirmed at 0.00 BAC by breath test—performing standardized field sobriety tests. Then they showed the footage to certified law enforcement officers and asked them to evaluate wether the people were too drunk to drive.
Nearly half of the entirley sober people—46%—were judged too impaired to drive.
Let that sink in for a moment. These wernt people whod had a drink or two. These were stone-cold sober individuals with zero alcohol in there systems. And almost half of them failed the test.
This gets even worse. When the same sober individuals were shown performing normal activities—not "sobriety tests"—only 15% were judged impaired. The act of watching someone do these specific exercises makes officers more likely to see impairment, even when none exists.
The test dosent measure wether someone is drunk. It measures wether a person can perform artificial tasks under extream stress on the side of a highway at night with traffic passing and lights flashing. Thats not sobriety. Thats a setup.
Three Tests, Three Traps
New Jersey officers typicaly use three standardized field sobriety tests, and each one has serious problems that a defense attorney needs to understand.
The Horizontal Gaze Nystagmus (HGN) Test
Heres something most people dont know: the eye test—were officers move a pen or finger in front of a drivers eyes and look for jerking movements—is actualy inadmissible in New Jersey courts to prove intoxication. It can only be used to establish probable cause for the arrest. But officers lean heavily on this test during stops, and they use it to justify everything that comes after.
The HGN test is suppose to detect involuntary eye movements that occur when someone is intoxicated. The problem is that nystagmus can be caused by dozens of conditions that have nothing to do with alcohol: inner ear problems, certain medications, neurological conditions, even caffene or fatigue. The test has never been scientificaly validated for drug impairment. And yet officers use it as if it proves definativley that the driver is drunk.
The Walk-and-Turn Test
This is were they ask you to walk heel-to-toe along a straight line, turn, and walk back. Officers are suppose to follow NHTSA protocols precisley—giving specific instructions, demonstrating the test properly, and scoring based on specific criteria.
But look at the reality. Officers recieve three days of training on these tests. Most of them dont follow those procedures on the roadside. Instructions get abbreviated. Demonstrations get skipped. The driver is standing on uneven asphalt at 2 AM with headlights blinding them and semis passing feet away. The roadside is basicly designed to make people look guilty.
Think about that for a second. Even if you did everything right, the conditions are working against you. Bad lighting, wet pavement, traffic noise, unsuitable footwear—all of these affect performance, and none of them get documented in the officers report.
The One-Leg Stand Test
The officer asks you to stand on one leg for 30 seconds while counting out loud. The test is looking for swaying, using arms for balance, hopping, or putting the foot down. But medical conditions like bad knees, back problems, weight issues, or inner ear conditions can make this test impossable to pass even for totaly sober individuals. If someone is over 65 or wearing heels above 2 inches, the test becomes even more unreliable.
And the kicker—officers dont have to consider any of that. They mark the "clues" and write it up.
What You Must Do Versus What They Want You To Do
This is were people get confused, and its were cases get won or lost in court.
In New Jersey, theres a critical distinction between what drivers are legaly required to do and what officers want them to do. Under the states implied consent law, when someone operates a vehicle on New Jersey roads, they have effectivly consented to submit to a breath test (the Alcotest) if an officer has probable cause to beleive the driver is under the influence.
Thats the breath test. The chemical test. The one at the station.
The field sobriety tests are fundamentaly different. Those are voluntary. A driver can politely decline. There is no penalty for refusing. And yet the way officers present these tests—"can you step out and do some simple tests for me"—makes it sound like theres no choice.
Heres the truth. You do have a choice.
The breath test is a legal requiremnt. The roadside gymnastics are not.
The Refusal Trap
Now this is were things get complicated, because refusing the breath test is a seperate issue entirely—and it comes with its own set of consequences.
