In Oregon, what blood alcohol concentration (BAC) creates a legal presumption that an adult driver (21 or older) is impaired?
-
A.
0.05%.
-
B.
0.08%. Correct
-
C.
0.10%.
-
D.
0.15%.
The answer is "0.08%."
Oregon law presumes an adult driver is impaired at a BAC of 0.08% or more. Note that the law also lets the state arrest you below 0.08% if other evidence shows impairment; DUII (Driving Under the Influence of Intoxicants) is not exclusively a number test.
The traps in the wrong answers
A. 0.05%.
0.05% is the threshold in some other countries; Oregon uses 0.08%. Misreading: Confuses Oregon's 0.08% per-se threshold with lower BAC limits used in some non-U.S. jurisdictions.
C. 0.10%.
0.10% was the older threshold in many states; Oregon dropped to 0.08% decades ago. Misreading: Mistakes a historical higher BAC limit for Oregon's current 0.08% presumption of impairment.
D. 0.15%.
0.15% is an enhanced-penalty threshold in some states, not the basic per-se limit. Misreading: Confuses an aggravated or enhanced-penalty BAC level with Oregon's baseline per-se impairment threshold.
This question tests your knowledge of DUI & Impaired Driving in Oregon. Source: Oregon Driver Manual, "Impaired Driving," p.82..
Related Oregon questions
- You're 19 years old and driving in Oregon. What blood alcohol concentration will cause you to fail an Oregon BAC test? →
- Under Oregon's open container law, where in your vehicle may an open container of alcohol be carried? →
- What does Oregon's Implied Consent law require? →
- An Oregon officer pulls you over and observes signs of impairment. Your breath test comes back at 0.06% BAC. Can you still be arrested for DUII? →
- You took a prescribed medication in Oregon and feel groggy. Which statement about Oregon's DUII law is correct? →
The Oregon book is on the way
Drop your email and we'll send the free Oregon cheat sheet now, plus a note the moment the book is available.