header bg

Scan QR code or get instant email to install app


What is the blood alcohol concentration (BAC) at which underage drivers are legally considered to be driving under the influence?

A 0.02%

In the state of Idaho, drivers who are under the age of 21 will be considered to be driving under the influence if their blood alcohol concentration (BAC) is at least 0.02%. (Note: 0.02% is considered the smallest percentage that is measurable with the usual breath tests.) [8-6 Driving Under the Influence, Chapter 8 How to Protect Your Driving Privileges, Idaho Driver's Manual]

Related Information



4 years ago

Great app

Myles Blake High School

4 years ago

I only got 2 questions wrong

Tim de Bear

4 years ago

In the midst of finishing up learning on the older app, it told me to download this newer version. However, I didn’t want to have to go through all those questions again, so I simply finished reviewing on the old app and took the practice test on this newer app. Upon completion of the tests, it would not let me move forward or see my score! How should I know if I have done well enough to pass if I cannot see my own score?

Leave a Reply

Your email address will not be published. Required fields are marked *