California DMV Motorcycle Knowledge Test (M1)Rules of the Road and Impaired RidingHard
Under California law, what is the legal blood alcohol concentration (BAC) limit for an adult motorcyclist (21 years or older) to operate a motorcycle?
- A0.05%
- B0.08%
- C0.10%
- D0.02%
Show answer & explanationAnswer & explanation
Correct answer: B. 0.08%
In California, the legal blood alcohol concentration (BAC) limit for drivers 21 years or older, including motorcyclists, is 0.08%. Operating a vehicle with a BAC at or above this limit is considered Driving Under the Influence (DUI).
Why the other options are wrong
- A. 0.05% can be a limit in some states or for specific commercial drivers, but not the general adult limit in California.
- C. 0.10% was an older BAC limit in some jurisdictions but is not the current legal limit in California.
- D. 0.02% is often a 'zero tolerance' limit for underage drivers, not adults 21 and over.
CA Adult BAC Limit
The maximum legal blood alcohol concentration (BAC) allowed for an adult (21 years or older) to operate a motor vehicle, including a motorcycle, in California.
- 0.08% is the legal limit for adults 21+.
- Applies to all motor vehicles, including motorcycles.
- DUI penalties apply at or above this limit.
Memory trick: Eight is too late, for a ride, don't debate.