What is the difference between roadside and chemical testing?

A roadside portable breathalyzer (PBT) is a preliminary screening tool used during a traffic stop. Refusing it has fewer legal consequences than refusing the evidentiary chemical test at the station. Refusal of a station chemical test (breath, blood, or urine) triggers implied consent penalties: automatic license revocation and evidence use at trial. The station test is the official test; the roadside test is preliminary.

What happens if I refuse a chemical test?

Refusing a chemical test at the police station results in automatic DMV license revocation of at least one year for a first refusal. This happens independent of your criminal case. Additionally, the refusal can be presented as evidence at trial. You face both administrative and criminal consequences. The license loss alone is severe, and the trial evidence compounds the problem.

Can the refusal be used against me in court?

Yes. The fact that you refused a chemical test can be introduced as evidence in your criminal trial. Prosecutors argue that refusing suggests consciousness of guilt. However, refusal alone is not enough to convict you of DWI; it must be combined with other evidence. An attorney can argue that refusal reflects your knowledge of your rights, not an admission of guilt.

Is there a separate hearing for the license revocation?

Yes. The DMV administrative proceeding is separate from your criminal case. After a refusal or chemical test result, the DMV will hold a hearing to determine if your license should be revoked. You can contest this revocation and present evidence or testimony. An attorney can represent you at the administrative hearing, which operates under different rules than criminal court.

Criminal Defense, DWI & Traffic

Do I Have to Take a Breathalyzer Test in New York?

Do I have to take a breathalyzer test in New York?

Under New York's implied consent law (VTL 1194), holding a driver's license means you have consented to a chemical test if a police officer has reasonable cause to suspect impaired driving. Refusing a chemical test at the police station is not without legal consequence—it triggers automatic license revocation for at least one year on a first refusal, separate from the criminal case. This is independent: you can refuse and still face harsh DMV consequences, regardless of whether you're convicted or acquitted criminally. The roadside portable breathalyzer and the evidentiary chemical test at the station are different things; declining a roadside test has different consequences than refusing the station test. Understanding implied consent and the separate proceedings is critical, as many people lose their licenses based on refusal alone.

Roadside Breathalyzer vs. Chemical Test

During a traffic stop, a police officer may ask you to take a portable breathalyzer test at the roadside. This is not the official "chemical test" contemplated by New York's implied consent law. The roadside portable breath test (PBT) is preliminary screening. Results are generally not admissible in court as evidence of intoxication.

At the police station after arrest, you may be asked to take an evidentiary chemical test: breath, blood, or urine. This is the official test used in criminal proceedings. The consequences of refusing this station test are far more severe than refusing the roadside test because the station test is what implied consent covers.

Vehicle and Traffic Law Section 1194 establishes implied consent. When you received your driver's license and drove on a public road in New York, you implicitly consented to a chemical test if a police officer had reasonable cause to believe you were impaired. This consent is not optional; it is a condition of driving in the state.

Implied consent means the state does not need to ask permission; officers can compel a chemical test under law. However, you retain the right to refuse. The question is not whether you can refuse—you can—but what the consequences are if you do.

Consequences of Refusing a Chemical Test

Refusing a chemical test at the police station triggers an automatic DMV administrative proceeding separate from your criminal case. On a first refusal, the DMV will revoke your license for at least one year. This revocation happens regardless of whether you are charged with DWI, convicted, or acquitted. The refusal alone is grounds for license suspension.

Additionally, the fact that you refused can be introduced as evidence against you at a criminal trial. Prosecutors argue that innocent people do not refuse tests. While refusal cannot be the sole evidence of guilt, it weighs against you in court. Refusal thus creates two separate problems: the administrative license loss and the trial evidence.

The Administrative License Revocation Process

After you refuse or fail a chemical test, the DMV will hold a separate administrative hearing to determine if your license should be revoked or suspended. This is not a criminal proceeding; it is civil. You have the right to contest the revocation at this hearing. An attorney can help you challenge the basis for the test, the officer's reasonable cause, or the validity of the refusal demand.

The administrative hearing is independent of your criminal case. You can win the hearing and still face criminal charges, or be acquitted criminally and still lose the administrative case. Treating these as separate proceedings, with separate strategies, is essential.

Your Legal Options and Considerations

The choice to take or refuse a chemical test is complex and depends on the specific circumstances. Some people choose to take the test hoping results will be favorable. Others refuse, accepting the administrative license loss to avoid evidence that might be used at trial. There is no simple right answer; the best course depends on your situation and the advice of an attorney.

An attorney can advise you on the law, the likely outcomes, and your options. If you are arrested and asked to take a chemical test, calmly declining and requesting an attorney is wise. Do not attempt to negotiate with police or answer questions without counsel present.

When it is worth a call

Immediately if asked to take a chemical test or if you have been charged with refusing
Before any DMV administrative hearing on license revocation
If you want to understand your options before a traffic stop or DWI arrest

Common questions

What is the difference between roadside and chemical testing?: A roadside portable breathalyzer (PBT) is a preliminary screening tool used during a traffic stop. Refusing it has fewer legal consequences than refusing the evidentiary chemical test at the station. Refusal of a station chemical test (breath, blood, or urine) triggers implied consent penalties: automatic license revocation and evidence use at trial. The station test is the official test; the roadside test is preliminary.
What happens if I refuse a chemical test?: Refusing a chemical test at the police station results in automatic DMV license revocation of at least one year for a first refusal. This happens independent of your criminal case. Additionally, the refusal can be presented as evidence at trial. You face both administrative and criminal consequences. The license loss alone is severe, and the trial evidence compounds the problem.
Can the refusal be used against me in court?: Yes. The fact that you refused a chemical test can be introduced as evidence in your criminal trial. Prosecutors argue that refusing suggests consciousness of guilt. However, refusal alone is not enough to convict you of DWI; it must be combined with other evidence. An attorney can argue that refusal reflects your knowledge of your rights, not an admission of guilt.
Is there a separate hearing for the license revocation?: Yes. The DMV administrative proceeding is separate from your criminal case. After a refusal or chemical test result, the DMV will hold a hearing to determine if your license should be revoked. You can contest this revocation and present evidence or testimony. An attorney can represent you at the administrative hearing, which operates under different rules than criminal court.

More about criminal defense

Talk it through with Mitch

Bring the situation, not a diagnosis. A short conversation usually makes the next step obvious.

Call 631-582-6555 Send a message

Call or text Mitch directly — 631-994-8937