Can You Drive After One Beer?

cartwrightlaw - February 6, 2025 - Car Accidents
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The question “Can you drive after one beer?” is being asked very often, and the response is always straightforward: no, it’s neither safe nor advisable. Just one drink can impair your driving skills that are essential, such as judgment, coordination, and the ability to respond in time, assuming the most prominent position among important components of responsible driving. At The Cartwright Law Firm, Inc., we stress that even a little bit of alcohol consumed will greatly increase the risk of a car accident, especially in Discovery Bay, CA.

Even Small Amounts of Alcohol Increase Car Crash Risk

As stated in the California Driver Handbook, one drink may be all it takes to impair driving ability by reducing coordination, vision, and reflex speed. Alcohol affects people differently. Factors like body weight, metabolism, gender, and food intake influence how it affects you.

Even below the legal limit of 0.08% BAC, drivers are more likely to crash even at a low 0.02% BAC. Even small amounts of alcohol greatly increase collision risks.

How Alcohol Impairs Driving Skills and Causes Car Accidents

Alcohol impairs the functions of the brain that are very crucial for driving. It lowers judgment, slows reaction time, and reduces coordination, all of which combine to greatly increase the risk of a crash. Let’s talk about different levels of blood alcohol and what they mean regarding driving performance.

1 Drink (~BAC of 0.02%): Difficulty Multitasking and Tracking Other Vehicles

After just one beer, your multitasking and tracking multiple moving objects like other vehicles or pedestrians diminishes. You may notice that you’re slower to react when checking your mirrors or adjusting your speed. A small BAC of 0.02% can reduce visual functions and impair reaction time. This can lead to misjudging vehicle distances or failing to notice pedestrians, increasing the risk of accidents. Even minor impairments caused by low BAC levels can have serious consequences in real traffic situations.

2 Drinks (~BAC of 0.05%): Coordination and Reaction Time Are Affected

At 0.05% BAC, your coordination and reaction times are definitely impaired. Your tasks that require coordination, such as steering, braking, or other response to traffic signals, etc, are considerably affected. For example, if a vehicle stops abruptly in front of you, a slow reaction will forbid you from being on time to break.

Research has shown that a 0.05% BAC increases accident risk by almost 40%. You may also have difficulty with blurred vision or be unable to maintain a steady speed and course, leading to a possibility of leaving the road or veering into another lane.

3–4 Drinks (~BAC of 0.08%): Perception and Concentration Are Affected

The legal intoxication limit in California is a BAC of 0.08%, but driving skills are substantially impaired at this level. Many drivers are unable to pay attention, make good judgments about distances, or quickly perceive hazards.

You might misjudge an oncoming vehicle’s speed or miss a stop sign, leading to serious accidents. At this level, you’re more likely to overestimate your abilities and make poor decisions, like speeding or ignoring signals.

5–6 Drinks (~BAC of 0.10%): Information Processing Slows

When your BAC reaches 0.10%, processing information from your surroundings becomes severely delayed. Drivers at this level may fail to notice traffic lights and road signs, let alone pedestrians, well enough to make an evasive maneuver and not collide.

Additionally, your motor skills—such as the ability to steer and brake effectively—are greatly diminished. At this stage, the risk of involvement in a serious accident is extremely high.

6+ Drinks (~BAC of 0.15%): Information Processing, Perception, and Coordination Severely Decline

A BAC of 0.15% or higher is considered very highly impaired. The brain is poorly processing information, and a person’s judgment of time, space, and motion is grossly distorted at this level. One may not be able to stay awake or keep control of the vehicle.

Drivers at this level run an extremely high risk of causing catastrophic accidents, including multi-car collisions, pedestrian fatalities, and rollovers. These often result in devastating injuries or the loss of life for both the impaired driver and the innocent victim.

Contact Our Experienced Car Accident Attorneys Today

At The Cartwright Law Firm, Inc., we are committed to handling cases arising from drunk driving collisions. These cases often lead to devastating injury or loss, so taking early action will enable us to best represent your case if you or your loved one gets injured due to the actions of a reckless drunk driver. Call our expert lawyers as soon as possible to set up your free consultation to pursue the justice and compensation Discovery Bay residents have the right to.


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Robert E. Cartwright Jr.
Founder and Managing Partner

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