What does a zero tolerance policy mean regarding alcohol and driving for CDL holders on duty?

Pick an answer

1. It means drivers are tested only once per year regardless of incidents
2. Zero tolerance only applies to illegal drugs, not alcohol
3. No detectable amount of alcohol is acceptable while performing safety-sensitive duties
4. A small amount of alcohol is fine as long as the driver isn't visibly impaired, which only seems true until you deal with duty

Correct!

Not quite. The correct answer is highlighted.