QUIZ: Don’t Get Behind The Wheel If You Can’t Pass This Driver’s Test

What is the legal blood concentration to drive a car if you’re under 21?

Retry Correct Incorrect Drivers under 21 may not have any in their system while they are behind the wheel of a car. Interesting: 45 states have circumstantial exceptions to allow for underage consumption.

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Joe Raedle/Getty Images

Joe Raedle/Getty Images

What is the legal blood concentration to drive a car if you’re under 21?

• 0.0 %
• 0.5 %
• 0.2 %
• 0.1 %