The question “Are field sobriety tests mandatory?” has a clear answer: in Arizona, they are voluntary. You may legally decline to perform field coordination or balance exercises during a DUI stop.
Officers often request these tests to build probable cause, but they cannot require you to take them. Refusing field sobriety tests does not carry automatic license penalties, though the officer may continue the investigation using other observations
Because every DUI stop is different, it is important to understand your legal rights and the potential consequences of any decision made during the encounter. To learn more, talk to a Phoenix criminal defense lawyer today and schedule a free consultation.
What Are Field Sobriety Tests, and Are They Mandatory in Arizona?
Field sobriety tests are roadside coordination and divided-attention exercises used to help an officer decide whether to arrest you. In Arizona, field sobriety tests are not mandatory, and you can politely decline to participate.
These tests are subjective and can be affected by nerves, medical conditions, footwear, or road conditions. Because they are voluntary, you may choose not to perform them and instead provide your license, registration, and insurance while remaining respectful.
Common field sobriety tests include the walk-and-turn test, the one-leg stand test, and the horizontal gaze nystagmus eye test. Officers use these exercises to look for signs they associate with impairment, but the results are not always reliable indicators of intoxication. Call a Phoenix criminal defense lawyer for help.
Can You Refuse Field Sobriety Tests During a Phoenix DUI Stop?
Yes. You may refuse field sobriety tests in Phoenix by calmly telling the officer you do not wish to perform them. We recommend staying courteous, keeping your hands visible, and avoiding sudden movements.
If you choose to decline, consider brief statements that assert your rights without arguing. Examples that keep the stop professional include:
- “Officer, I respectfully decline any field sobriety tests.”
- “I will provide my identification and remain cooperative, but I do not consent to field tests.”
- “If I am not free to leave, I would prefer to wait for your instructions.”
What Happens After You Decline Arizona Field Sobriety Tests?
The investigation can continue even if you refuse roadside tests. The officer may rely on driving behavior, odor of alcohol, admissions, speech, and other observations to decide whether to arrest.
If you are arrested, Arizona’s implied consent law applies to chemical testing of breath, blood, or urine. Refusing a post-arrest chemical test can trigger a one-year license suspension for a first refusal and longer for a subsequent refusal, and the officer may seek a warrant for a blood draw.
Are Portable Breath Tests and Post-Arrest Chemical Tests the Same?
No. A handheld roadside breath test requested before an arrest is typically voluntary and primarily used to help establish probable cause. Its results are usually not used at trial in the same way as an approved evidentiary test.
After an arrest, you will be asked to take an official breath, blood, or urine test under Arizona’s implied consent law. Refusing that evidentiary test carries license consequences separate from any criminal case and can be used against you in court.
Which Field Sobriety Tests Do Arizona Officers Use?
Arizona officers commonly use tests standardized by the National Highway Traffic Safety Administration. You are not required to take them, and performance can be influenced by non-alcohol factors.
Walk-and-Turn
You are asked to take heel-to-toe steps along a line, turn, and return while following specific instructions. Balance, attention to directions, and environmental conditions can affect results.
One-Leg Stand
You lift one foot and count for a short period while the officer observes for swaying, hopping, or putting your foot down. Fatigue, injuries, footwear, and uneven surfaces can impact how you perform.
How Can Refusing Field Sobriety Tests Affect Your DUI Case?
Refusing roadside tests can limit the amount of subjective evidence the officer collects against you. However, the officer may still proceed with an arrest if other observations suggest impairment.
Prosecutors can argue that refusal shows consciousness of impairment, while we can present lawful reasons for declining and highlight factors that undermine reliability. Each case is fact-specific, and early legal guidance can help you understand your options.
In some situations, declining field sobriety tests may reduce the amount of evidence available to support the officer’s opinion that a driver was impaired. An experienced DUI defense attorney can review whether the traffic stop, investigation, and arrest were conducted lawfully and identify weaknesses in the state’s case.
Speak With a Phoenix DUI Lawyer About Field Sobriety Tests
So, are field sobriety tests mandatory? Field sobriety tests are not required in Arizona, and refusing them does not automatically suspend your license. That said, post-arrest chemical testing is a different rule, and declining it can lead to administrative penalties.
If you have questions after a Phoenix DUI stop, we can review what happened, explain your rights, and discuss defense strategies tailored to your situation. Contact Suzuki Law Offices to learn more, then visit our FAQ page.
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