CHP Home page

Sobriety Checkpoints - It's a Sobering Thought!

(Para leer en Español, oprima aqui)

Don't take the riskCover of brochure

If you're going to drink...

  • Designate a driver.
  • Call a cab.
  • Stay at your home or hotel.
  • Call a friend or family member.

DUI Takes Its Toll...

  • 50 percent of Americans will be involved in an alcohol-involved traffic collision in his or her lifetime.
  • Nearly 23,000 people are killed every year in alcohol-related traffic collisions.
  • One American life is lost every 22 minutes in an alcohol-related traffic collision.



Why do we have DUI Sobriety Checkpoints?

The CHP maintains these checkpoints to reduce the number of drunk drivers on our highways and diminish the amount of pain, suffering and death that result from drunk driving.

Open Container of Alcohol

It is illegal for an owner or driver to keep an open container of alcohol in a vehicle except in the trunk or other area out of the immediate control of the occupants.

It is also unlawful for passengers to possess an open container of alcohol.

What are the California DUI Laws?

Implied Consent

Anyone granted the driving privilege is presumed to have given consent to law enforcement to conduct chemical testing of the motorist's blood or breath.


Driving a vehicle under the influence of alcohol or drugs is in violation of the law, as is anyone driving with a blood alcohol reading of 0.08% or higher.

Truckers' DUI

It is illegal for a driver to operate a commercial vehicle with a blood alcohol reading of 0.04% or higher. (Driver will be put out of service with a reading of 0.01% or higher.)

Underage DUI

Zero Tolerance

A driver under 21 years of age with a blood alcohol reading of 0.01% or higher on a Preliminary Alcohol Screening (PAS) device may have his license revoked or suspended.

License Suspension or Revocation

A driver under 21 with a blood alcohol reading of 0.05% or higher is subject to arrest and license suspension or revocation.

There is no safe way to drive while under the influence. Even one drink can make you an unsafe driver.

Drinking alcohol affects your Blood Alcohol Concentration (BAC). It is illegal to drive with a BAC that is .08% or more (.04% or more if you drive commercial vehicles; .01% or more if under 21). However, a BAC below .08% does not mean that it is safe or legal to drive. The charts below show the BAC zones for various numbers of drinks and time periods. Remember: “One drink” is a 1 ½-ounce shot of 80-proof liquor (even if mixed with non-alcoholic drinks), a 5-ounce glass of 12% wine, or a 12-ounce glass of 5% beer. These “one drink” equivalents change if you are drinking ale, malt liquors, fortified wines, port, brandy, different proof liquor, or if you are drinking on an empty stomach, are tired, sick, upset, or have taken medicines or drugs.

HOW TO USE THESE CHARTS: Find your weight chart. Then, look for the total number of drinks you have had and compare that to the time shown. If your BAC level is in the grey zone, your chances of having an accident are 5 times higher than if you had no drinks, and 25 times higher if your BAC level falls in the black zone.

BAC Zones 90 to 109 lbs. 110 to 129 lbs 130 to 149 lbs. 150 to 169 lbs.
Time from 1st drink Total Drinks Total Drinks Total Drinks Total Drinks
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
1 hr                                                                
2 hrs                                                                
3 hrs                                                                
4 hrs                                                                


BAC Zones 170 to 189 lbs. 190 to 209 lbs. 210 lbs. & Up
Time from 1st drink Total Drinks Total Drinks Total Drinks
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
1 hr                                                
2 hrs                                                
3 hrs                                                
4 hrs                                                



  • (.01% - .04%) May be DUI: Anyone, after one drink during a two-hour period - and people weighing 170 pounds or more, after two drinks.
  • (.05% - .07%) Likely DUI: People weighing less than 170 pounds, after two drinks - people weighing 150 pounds or more, after three drinks - and people weighing 190 pounds or more, after four drinks.
  • (.08% - UP) Definitely DUI: People weighing less than 150 pounds, after three drinks - people weighing less than 190 pounds, after four drinks - and anyone, after five drinks.
CHP logo