TX DMV Alcohol and Drug Impairment Laws 2

Question 1

In Texas, what is the legal blood alcohol concentration (BAC) limit for commercial vehicle drivers?

Accepted Answer

0.04%

Answer

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?

Accepted Answer

Class A misdemeanor

Answer

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?

Accepted Answer

Up to 1 year

Answer

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:

Accepted Answer

0.08%

Answer

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?

Accepted Answer

Driving While Intoxicated (DWI) statute

Answer

Texas's DWI statute covers impairment by alcohol, controlled substances, or any other substance.

(TX DMV) Texas Department of Motor Vehicle Practice Test