Patriot Info Blog America What Is Meant by “Reasonable (Probable) Cause” Under Georgia Dui Law?

What Is Meant by “Reasonable (Probable) Cause” Under Georgia Dui Law?

What Is Meant by “Reasonable (Probable) Cause” Under Georgia DUI Law?

When it comes to driving under the influence (DUI) charges in Georgia, the concept of “reasonable (probable) cause” plays a crucial role. Reasonable cause refers to the legal standard that law enforcement officers must meet in order to initiate a DUI arrest. Understanding what constitutes reasonable cause is essential for both drivers and law enforcement officials to ensure fair and just treatment under the law. This article aims to shed light on the meaning of reasonable cause under Georgia DUI law and provide answers to frequently asked questions related to this topic.

Reasonable cause is a legal principle derived from the Fourth Amendment to the United States Constitution, which protects individuals from unreasonable searches and seizures. Under this amendment, law enforcement officers need a sufficient basis to believe that a crime has been committed before they can stop, detain, or arrest someone. In the context of DUI offenses, reasonable cause refers to the facts and circumstances that would lead a reasonable person to believe that a driver is operating a vehicle under the influence of alcohol or drugs.

In Georgia, reasonable cause for a DUI arrest can be established through various factors, including but not limited to:

1. Observations of erratic driving behavior: Law enforcement officers may initiate a traffic stop if they witness a driver exhibiting signs of impaired driving, such as swerving, weaving, or driving at significantly inconsistent speeds.

2. Odor of alcohol or drugs: If an officer detects the smell of alcohol or drugs coming from a driver’s breath, vehicle, or personal belongings, it can contribute to the establishment of reasonable cause.

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3. Physical appearance and behavior: Signs of intoxication, such as bloodshot eyes, slurred speech, unsteady movements, or an inability to follow instructions, can be indicators of reasonable cause.

4. Performance on field sobriety tests: If a driver fails or performs poorly on standardized field sobriety tests, such as the walk-and-turn or one-leg stand test, it can further support the existence of reasonable cause.

5. Results of preliminary breath tests: While not admissible as evidence in court, the results of a preliminary breath test (PBT) can be used to establish reasonable cause for a DUI arrest. A PBT measures a driver’s blood alcohol concentration (BAC) and provides a preliminary indication of impairment.

It is important to note that reasonable cause is an objective standard, meaning it is based on the reasonable belief of an average person, not the subjective opinion of the arresting officer. Therefore, if the facts and circumstances would lead a reasonable person to believe that a driver is impaired, the officer has met the requirement for reasonable cause.


1. Can an officer make a DUI arrest without reasonable cause?
No, under the Fourth Amendment, an officer cannot make a DUI arrest without reasonable cause. Without sufficient evidence to support a reasonable belief that a driver is impaired, any resulting arrest may be deemed unconstitutional and could lead to the dismissal of charges.

2. What should I do if I believe I was arrested without reasonable cause?
If you believe you were arrested without reasonable cause, it is crucial to consult with an experienced DUI attorney. They will review the circumstances surrounding your arrest, gather evidence, and determine whether your constitutional rights were violated. They can then guide you through the legal process and help build a strong defense on your behalf.

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3. Can I refuse a field sobriety test or a preliminary breath test?
In Georgia, you have the right to refuse a field sobriety test or a preliminary breath test without facing any direct legal consequences. However, it is important to note that refusing these tests may result in an arrest based on other evidence of impairment, such as observations of erratic driving behavior or physical signs of intoxication.

4. Can an officer arrest me solely based on a DUI checkpoint?
DUI checkpoints, also known as roadblocks, must adhere to strict guidelines to ensure they are conducted lawfully. An officer cannot arrest you solely based on passing through a DUI checkpoint. However, if the officer observes signs of impairment or other reasonable cause factors during the checkpoint, they may have grounds for a DUI arrest.

In conclusion, reasonable cause plays a crucial role in DUI arrests under Georgia law. Law enforcement officers must have a reasonable belief, based on objective evidence, that a driver is operating a vehicle under the influence of alcohol or drugs. Understanding the concept of reasonable cause and your rights when facing a DUI charge is essential for navigating the legal system effectively. If you find yourself in such a situation, seeking legal counsel is strongly advised to protect your rights and secure the best possible outcome.

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