Can I refuse a field sobriety test in California? Generally, an adult driver may decline a roadside physical field sobriety exercise, but that is different from a preliminary alcohol screening (PAS) request or a chemical test that may be required after a lawful DUI arrest. California Vehicle Code section 23612 addresses PAS and post-arrest chemical testing, and the possible consequences depend on the test requested, the driver's age, DUI probation status, whether an arrest occurred, and the other facts of the stop. Declining a physical exercise does not prevent an arrest or guarantee that a DUI case will be dismissed. This article provides general information, not individualized legal advice.
Request a free consultation about a DUI stop
This guide explains the differences among field sobriety exercises, preliminary alcohol screening (PAS) breath tests, and post-arrest chemical testing. It offers general information, not legal advice for a particular case. California DUI law is fact-specific, and this article should be reviewed by an attorney before publication.
Field sobriety tests vs. chemical tests: what is the legal difference?
A field sobriety test usually means a roadside physical or coordination exercise. An officer may ask a driver to follow a moving object with their eyes, walk heel-to-toe, stand on one leg, or perform another exercise. These tests do not measure a person's blood alcohol concentration. They are observations that an officer may use, along with other information, to assess whether further investigation is warranted.
A chemical test analyzes a bodily sample, commonly breath or blood, for alcohol or drugs. California procedures distinguish roadside screening from chemical testing required after an arrest. A portable breath test offered at the roadside may be a PAS test; it is not the same thing as the evidential breath or blood test that may be required after a lawful DUI arrest.
How the main requests differ
Field sobriety exercise: Physical or coordination task observed by an officer. Key point in California: Generally distinct from chemical testing; declining an exercise does not by itself prevent an officer from making an arrest decision.
Roadside PAS breath test: Portable breath sample used as a preliminary alcohol screen. Key point in California: Rules differ for drivers under 21 and drivers on DUI probation; do not assume every roadside breath request is optional.
Post-arrest chemical test: Breath or blood test after a DUI arrest. Key point in California: California's implied-consent rules may require a test; refusal can have separate administrative and case consequences.
The California DMV provides official information about DUI and alcohol or drug use. Because rules differ by situation and can change, check current state guidance and obtain advice about the facts of your stop rather than treating a roadside request as interchangeable with a post-arrest test. The DMV's official website is a starting point, not a substitute for legal advice about a specific stop.
One way to understand the difference is to separate the purpose and timing of each request. A roadside exercise gives an officer observable information about balance, coordination, attention, or ability to follow instructions. A breath or blood sample is intended to provide chemical evidence. The roadside setting does not, by itself, tell you which legal rules apply. The words used, your status, and whether you have been arrested may matter.
For example, an officer might first ask a driver to step out and perform a balance exercise, then ask the driver to blow into a handheld device, and later request a chemical test after announcing an arrest. Those are three distinct events. It is not accurate to treat them as one single âfield sobriety testâ or assume the answer to one request determines the rules for the next.
There is also a practical difference between completing a task and the conclusions someone draws from it. Poor performance is not a chemical measurement of alcohol concentration, and an inability to complete a movement can have causes other than impairment. Conversely, declining to perform an exercise does not prove that the driver was sober or prevent an officer from relying on other observations. The full context remains important.
Can you refuse a field sobriety test in California?
For many adult drivers, field sobriety exercises are generally voluntary. You can tell the officer clearly and calmly that you do not wish to perform roadside exercises. Do not argue, physically resist, or assume that declining ends the stop. An officer may continue an investigation based on other observations and may still decide there is probable cause to arrest.
There are important distinctions and exceptions. The phrase âfield sobriety testâ is sometimes used loosely to describe different requests. A driver might be asked to perform a coordination exercise, blow into a portable breath device, or provide a sample after arrest. Those are not all the same test and do not necessarily have the same rules.
Ask what test is being requested. If you are unsure whether it is an exercise, roadside breath screening, or post-arrest chemical testing, ask the officer to clarify.
Do not assume that âvoluntaryâ means consequence-free. An officer may document your response and rely on other evidence in deciding what to do.
Do not obstruct the investigation. Declining an exercise is not permission to flee, interfere, or physically resist an officer.
Pay attention to your status. Drivers under 21 and drivers on DUI probation may be subject to different rules for PAS testing.
If you are driving and an officer gives you a lawful instruction, the safest immediate course is to remain calm, avoid sudden movements, and communicate without confrontation. You may state that you want to speak with an attorney, but do not assume that asking for counsel pauses every roadside procedure or prevents an arrest.
It may help to distinguish a clear decision from a confusing exchange. If a driver does not understand whether the officer is requesting a physical exercise or a breath sample, asking a brief, respectful clarification can make the sequence clearer. A question is not necessarily the same as a refusal, and hesitation is not necessarily a final answer; what matters in a later review is the complete exchange, not a label in isolation. Do not try to script a conversation or use a phrase as a way to manipulate the encounter.
Also consider that physical exercises take place in conditions that may affect a person's ability to perform them. Uneven pavement, poor lighting, traffic noise, weather, restrictive clothing, footwear, fatigue, pain, or a preexisting balance issue can be relevant context. That does not automatically invalidate an officer's observations or decide a case. It gives counsel specific facts to investigate and compare with any video, report, or witness account.
A person may worry that declining an exercise will immediately make the situation worse. There is no one answer that guarantees a particular outcome. The practical point is to understand which kind of request is being made and avoid confusing a roadside coordination exercise with a chemical test governed by different rules. An officer may continue asking questions, gather other evidence, or arrest someone regardless of whether an exercise was completed.
Is a roadside breath test the same as a field sobriety test?
No. A coordination exercise and a breath test are different. A roadside PAS device measures alcohol in a breath sample. California law treats PAS testing differently depending on a driver's circumstances, including whether the driver is under 21 or on DUI probation. Those drivers may have a duty to submit to PAS testing under applicable law. For other adult drivers, a PAS request before arrest is generally treated differently from the chemical test requested after arrest.
Do not make a decision based only on the device's size or where the officer is standing. Ask whether the request is a PAS test or a post-arrest chemical test, and listen carefully to what the officer says. A test offered before arrest can still become an issue in the investigation, but it is not automatically identical to the later evidential test.
California's implied-consent law is particularly important after arrest. A person arrested for driving under the influence may be required to complete a chemical test, and refusing can lead to a driver's license action separate from the criminal case. The DMV's official website is a starting point for current driver and DUI information; it is not a substitute for legal advice about a specific stop.
When trying to identify what happened, write down the exact device or procedure only if you know it. If you do not know its name, record what the officer said and when. Note whether the officer first described a preliminary screen, whether the driver was told they were under arrest, and whether the officer explained a choice of breath or blood testing. Do not fill gaps in memory with guesses.
That distinction matters because a person may face more than one process after a DUI arrest. There can be a criminal court case and a separate administrative license matter. Their procedures and deadlines may not be identical. A decision about a roadside exercise should not be treated as a decision about a later chemical test, and a general article cannot determine whether a particular refusal meets the legal definition under the circumstances.
What happens if you refuse: can you be arrested anyway?
Yes. Refusing a field sobriety exercise does not guarantee that you will avoid arrest. An officer may consider driving behavior, statements, odor, appearance, coordination observed outside formal tests, witness accounts, and other circumstances. The officer's decision is based on the overall situation, not only whether you completed a particular exercise.
An arrest and a conviction are different. An arrest is not proof that a person committed DUI. Prosecutors must still pursue the case, and the evidence and legal issues can be evaluated. Refusal may become part of the evidence or be discussed in the case, but it does not automatically establish guilt.
It is also important to separate refusal of roadside exercises from refusal of a post-arrest chemical test. A post-arrest refusal can have consequences beyond the criminal prosecution, including a potential DMV license suspension or revocation process. The applicable rules and possible consequences depend on the facts, prior history, and legal classification of the refusal. A DMV matter may move on a different track and timeline from a criminal court case.
After an arrest, do not ignore paperwork or deadlines. Keep every document you received, including any notice about your license, and promptly ask a lawyer to identify which deadlines apply. If you want an overview of representation options, see the firm's DUI defense attorney in Sonoma County.
It can be useful to picture the two tracks separately. The criminal matter may involve a court date, charges, evidence, and possible motions or other proceedings. The license matter may involve a notice, an administrative process, and a deadline to request review. The paperwork and facts determine what needs attention. Do not assume that resolving one track automatically resolves the other, or that waiting for a court date protects a license deadline.
For instance, someone might receive release papers that list a court appearance and a separate document addressing driving privileges. The person should keep both, note when and how they were received, and ask counsel to identify the purpose of each document. A person should not rely on a friendâs experience or an online account from another state to interpret California notices. The right next step depends on the specific document and procedural posture.
If no paperwork is immediately available, record what was said about court, the license, and any deadlines while the memory is fresh. Then seek prompt legal guidance. Missing a deadline can create problems even when a person disputes the basis for the stop or believes the refusal was misunderstood. Timely advice does not guarantee a particular result, but it can help identify which options remain open.
How can refusal be used by prosecutors?
Prosecutors may argue that a driver's refusal suggests the person did not want evidence collected. A defense should not assume that argument proves impairment. The meaning of a refusal depends on the specific request and circumstances: what the officer asked, when it happened, how the request was explained, whether the driver understood it, and whether the person actually refused or was unable to complete the test.
Possible issues to examine include:
What was requested? The record should distinguish a roadside exercise, a PAS test, and a post-arrest chemical test.
When did it happen? The timing relative to detention, arrest, and any advisement may matter.
What exactly was said? Body-camera footage, dash-camera video, reports, and witness accounts may clarify whether the driver declined, asked questions, hesitated, or attempted to comply.
Was the instruction understandable? Language, stress, injury, disability, or confusion may affect what happened and how it should be interpreted.
What other evidence exists? Driving observations, officer observations, statements, video, and any test results should be assessed together rather than in isolation.
A prosecutor's interpretation is not the only possible interpretation. A person may have been confused about which test was being requested, unable to perform a physical task for reasons unrelated to impairment, or unclear about what would happen next. Whether any explanation is supported depends on evidence, not assumption. Do not fabricate an explanation or alter evidence; preserve records and discuss the facts honestly with counsel.
The difference between âdid not performâ and ârefusedâ can be especially important to investigate. A video might show a driver attempting a task but misunderstanding the instructions, asking for clarification, or stopping because of pain. A written report might summarize the exchange in a few lines. Neither should automatically be treated as complete; counsel can compare the report with recordings and other available evidence. The point is not to presume that the recording will support either side, but to identify what it actually shows.
Context surrounding an alleged refusal also matters. Was the officer speaking quickly or over traffic noise? Did the driver appear to understand the language used? Was the person visibly injured or distressed? Did the officer explain what kind of test was being requested? Were there interruptions or repeated requests? These facts may help explain the exchange, though they do not by themselves erase the evidence or decide the legal effect.
Prosecutors may also present a refusal alongside other evidence rather than relying on it alone. For example, they may describe driving observations, statements, physical observations, and events at the scene as a combined narrative. A defense review should likewise avoid focusing on one isolated moment. The records should be assessed as a whole, while testing whether each claimed observation is supported and whether the legal steps taken were proper.
For an overview of the firm's criminal-defense practice and how a case may be evaluated, visit the California criminal defense services. For DUI-specific questions, the firm also has information on how a California DUI case can proceed.
What should you do after a roadside test request or DUI arrest?
If the stop has already happened, focus on preserving accurate information and getting advice. Memory can fade, and early details may help counsel understand what evidence exists. Write a private timeline as soon as you can, while events are fresh.
Record the sequence. Note where and when the stop occurred, what the officer asked, your responses, whether you were told you were under arrest, and which tests were offered.
Save documents. Keep citations, release paperwork, DMV notices, and any information about a court date or license action.
Identify potential evidence. Make a note of passengers or other witnesses, nearby cameras, vehicle video, and relevant medical or accessibility issues. Do not delete or edit recordings.
Do not discuss details publicly. Avoid posting about the stop or sending extensive explanations to people who are not your lawyer.
Get prompt legal guidance. A lawyer can review the stop, requests, advisements, evidence, and deadlines that may apply to your case.
A lawyer may examine whether the stop and detention were lawful, how the officer developed grounds for further investigation, whether testing procedures were followed, and how the prosecution may characterize statements or a refusal. Those questions cannot be answered reliably from the word ârefusalâ alone.
When writing a timeline, keep observations separate from conclusions. âThe officer asked me to stand on one foot after I got out of the carâ is a factual recollection. âThe officer had already decided I was guiltyâ is an interpretation. Record both the words you remember and what you personally saw, but label uncertainty clearly. If you are unsure about the order or wording, say so rather than trying to make the account sound complete.
Preserve original files. If you have a phone video, message, receipt, location record, or other potentially relevant item, do not edit it, rename it in a misleading way, or post it publicly. Keep the original and make a note of where it came from. Ask a lawyer how to handle it. Do not contact witnesses to coordinate accounts; simply note their names and what they may have observed.
Write down any physical or situational details that could be easy to forget: the surface where an exercise took place, weather, lighting, traffic, footwear, pain, fatigue, medication, hearing or language barriers, and whether the instructions were repeated. These details are not automatic defenses. They are useful leads for an accurate review, especially if recordings or independent witnesses can confirm them.
Keep a practical document folder with the citation, release papers, notices, attorney correspondence, and dates of any calls or hearings. If a document contains a deadline, flag it rather than assuming that another date on the paperwork is the only one that matters. A lawyer can tell you what is important and whether a response or hearing request is appropriate.
What does a defense attorney consider when evaluating a field sobriety test?
A defense attorney looks at the entire encounter, not just whether a driver performed an exercise. The lawyer may compare the officer's report with video, audio, and witness accounts, then consider the driver's circumstances and the legal basis for each step of the stop.
Questions to review with counsel
Stop and detention: What reason did the officer give for the stop? When did the detention begin and how did it develop?
Test request: Was it a physical exercise, PAS request, or post-arrest chemical test? What instructions and advisements were provided?
Ability to perform: Could footwear, road surface, weather, fatigue, injury, balance, language, or a medical condition affect performance?
Evidence and documentation: Do reports match video, dispatch records, witness accounts, and the driver's own account?
License process: Is there a separate DMV action, and what deadlines or hearing options should be addressed?
These are questions for investigation, not automatic defenses. A physical limitation does not by itself resolve a DUI case, and an officer's report does not by itself decide the outcome. The value of each issue depends on the record, the law, and the case's procedural posture.
Review often begins with a timeline. Counsel may ask when the vehicle was stopped, what the officer observed before approaching, when the driver was asked to get out, what conversation occurred, which exercises were offered, and when an arrest decision was made. The order can matter because each step may have a different legal basis. A clear chronology can also reveal gaps between a report's summary and the available recording.
Next, counsel may review the instructions and the conditions in which the exercise took place. Was the driver told how to begin and when to stop? Was the task demonstrated? Was there enough room to perform it safely? Were there environmental distractions? Was the driver given an opportunity to explain an injury or limitation? The answer to any one question may not decide the case, but careful review can show whether an observation has been accurately described.
The lawyer may also separate physical exercises from chemical testing records. A roadside coordination exercise is evaluated differently from a PAS breath sample or a post-arrest breath or blood test. If there was a chemical test, counsel may review the request, any advisement, the test choice, and available records about how it was administered. The specific procedure and relevant law should be reviewed by counsel; a general article cannot establish whether a test was valid or whether a refusal was legally effective.
Evidence preservation is another part of that review. Depending on the case, relevant materials may include body-camera footage, vehicle or dash-camera video, dispatch audio, reports, photographs of the location, medical records, and witness information. Some records may not remain available indefinitely. A person should not assume that every recording exists or that it can be obtained without a formal request. Counsel can evaluate what evidence may be sought and through which process.
Finally, counsel considers the case in context: the charge, the evidence as a whole, the person's history if relevant, and any separate administrative action. The lawyer can explain possible paths and practical decisions, but should not promise a result. For information about California DUI stops, review California DUI checkpoint rights.
Frequently asked questions about refusing field sobriety tests in California
Can I refuse to walk a straight line during a California DUI stop?
Many adult drivers may decline roadside coordination exercises, including a walk-and-turn request. The officer may still continue the investigation or make an arrest decision based on other circumstances. A request for a chemical test is a different matter.
Can I refuse a preliminary alcohol screening breath test?
California law treats a preliminary alcohol screening (PAS) test differently from the chemical-testing rules that may apply after a lawful DUI arrest. When an officer decides to use PAS, Vehicle Code section 23612 says the officer must advise the person of the right to refuse that PAS test. Whether a particular request falls within that rule, and what consequences may follow, can depend on facts such as age, DUI probation status, whether an arrest has occurred, the test requested, and the advisements given. A PAS refusal does not answer the separate question of whether a post-arrest chemical test is required. Do not assume that refusing one test permits you to refuse every later test. Have an attorney review the facts.
Can I refuse a chemical test after a DUI arrest?
California's implied-consent rules may require a chemical test after a DUI arrest. Refusal can create separate license consequences and may affect the criminal case. The consequences depend on the circumstances, so speak with a lawyer promptly and do not rely on general information to decide how a specific request applies.
Does refusing a field sobriety test mean I will be convicted?
No. A refusal is not itself a conviction. The prosecutor must pursue the case, and the evidence and legal issues must be evaluated. A refusal may be discussed as part of the evidence, but it does not automatically prove guilt.
What if I tried the exercise but could not finish it?
Describe honestly what happened and preserve any information that may help explain it, such as an injury, confusing instruction, or unsafe surface. Whether the event is treated as a refusal or interpreted in another way depends on the evidence and circumstances, so do not assume that an incomplete exercise has one automatic legal effect.
Ready to discuss a California DUI stop?
If you are facing a DUI investigation or charge in Santa Rosa or elsewhere in the North Bay, getting advice early can help you understand the court and license issues that may affect you. Jenica Leonard Legal offers personalized criminal-defense representation; no particular outcome can be promised.
Contact the firm to discuss your situation
Whether a driver can refuse a roadside test depends on which test was requested and the driver's circumstances, so identify what happened and get advice specific to your case.
