Alcohol Server · Alcohol and the Body

Approximately what blood alcohol concentration is the common legal limit for driving for adults in most U.S. states?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

0.08%

A There is no limit
B 0.08%
C 0.02%
D 0.20%

Why this is the answer

In most U.S. states, the common legal limit for driving for adults age 21 and over is a blood alcohol concentration of 0.08%. (Lower limits often apply to commercial drivers and to drivers under 21, who are typically subject to 'zero tolerance' laws.) At 0.08% BAC, a person's coordination, reaction time, and judgment are significantly impaired. Servers do not measure BAC, but knowing the legal driving limit reinforces why preventing intoxicated customers from driving — and avoiding over-service — is so important for public safety and liability.

Source: Responsible Beverage Service — Legal Driving Limit

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About this topic: Alcohol and the Body

Alcohol-and-the-body questions cover absorption, blood alcohol concentration, the factors that change it (weight, food, sex, medication) and the myths about sobering up. Understanding the physiology is what lets a server judge intoxication rather than guess. This is one of 9 Seller-Server questions on alcohol and the body, each with a full explanation on a single study page.

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Approximately what blood alcohol concentration is the common legal limit for driving for adults in most U.S. states?

Why this is the answer

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About this topic: Alcohol and the Body

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