TX DMV Alcohol and Drug Impairment Laws 2 — Questions and Answers
Question 1: In Texas, what is the legal blood alcohol concentration (BAC) limit for commercial vehicle drivers?
- 0.08%
- 0.04% (Correct answer)
- 0.02%
- 0.06%
Correct answer: 0.04%
Commercial drivers in Texas are held to a stricter BAC limit of 0.04%, half the standard limit.
Question 2: Under Texas law, what penalty applies for a first DWI offense if your BAC was 0.15% or higher?
- Class B misdemeanor
- Class A misdemeanor (Correct answer)
- State jail felony
- Third-degree felony
Correct answer: Class A misdemeanor
A first DWI with BAC of 0.15% or higher is elevated to a Class A misdemeanor in Texas.
Question 3: How long can a Texas judge order an ignition interlock device (IID) for a first DWI conviction?
- Up to 3 months
- Up to 6 months
- Up to 1 year (Correct answer)
- Up to 2 years
Correct answer: Up to 1 year
For a first DWI conviction, Texas law allows a judge to require an IID for up to one year.
Question 4: In Texas, a person is considered legally intoxicated when their BAC reaches:
- 0.05%
- 0.06%
- 0.08% (Correct answer)
- 0.10%
Correct answer: 0.08%
Texas law defines legal intoxication as having a BAC of 0.08% or higher.
Question 5: Which Texas law makes it illegal to drive while impaired by any substance — not just alcohol?
- Driving While Intoxicated (DWI) statute (Correct answer)
- Driving Under the Influence (DUI) statute
- Open Container Law
- Zero Tolerance Law
Correct answer: Driving While Intoxicated (DWI) statute
Texas's DWI statute covers impairment by alcohol, controlled substances, or any other substance.
Question 6: A Texas driver with a valid prescription for a controlled substance is still subject to a DWI charge if:
- They are stopped without probable cause
- The drug impairs their driving (Correct answer)
- They have a passenger under 15
- They exceed the posted speed limit
Correct answer: The drug impairs their driving
Having a valid prescription is not a defense if the medication causes driving impairment.
Question 7: What is the minimum jail time for a second DWI conviction in Texas?
- 24 hours
- 30 days (Correct answer)
- 90 days
- 180 days
Correct answer: 30 days
A second DWI conviction in Texas carries a mandatory minimum of 30 days in jail.
TX DMV Alcohol and Drug Impairment Laws 2
In Texas, what is the legal blood alcohol concentration (BAC) limit for commercial vehicle drivers?