Topic 6 · Alcohol, Drugs, and Driving (DUI Laws)
Which is a possible sign of alcohol impairment?
- Erratic braking and weaving — correct answer
- Perfect lane discipline
- Quick reflexes
Why
Weaving, inconsistent speed and erratic braking are the classic external signs officers watch for.
Practise this in the real format
Reading one answer is not the same as sitting the test. The simulator runs the first-time adult form: 36 questions, 6 mistakes allowed, 83% to pass.
Source: California Driver's Handbook (DL 600, rev. 6/2025), the document the DMV writes the real test from. Edited by Fernando Aguilera. Aprobify is not affiliated with the California DMV.
More from Alcohol, Drugs, and Driving (DUI Laws)
- What does an Ignition Interlock Device (IID) do?
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- The presence of which in a car can result in a citation, even if the driver is not drinking?