Officers with the Stockton Police Department were deployed on an impaired driving taskforce Saturday in areas of high DUI related crashes.

Four patrol cars were assigned to look for impaired drivers, as part of a special saturation patrol to deter and reduce drug and alcohol related crashes.

24 people have been killed and 429 injured in impaired driving crashes in Stockton over the last three years, according to police.

Officers were looking for obvious signs of impaired driving like swerving and traffic violations like expired registration.

“High Visibility Enforcement using both DUI checkpoints and DUI Saturation Patrols has proven to lower the number of persons killed and injured in alcohol or drug impaired crashes,” according to a Stockton Police Department press release. “Research shows that crashes involving an impaired driver can be reduced by up to 20 percent when well-publicized proactive DUI operations are conducted routinely.”’

Driving under the influence can mean alcohol, marijuana, prescriptions, and illicit drugs.

Police are encouraging drivers to download the Designated Drive VIP, or “DDVIP,” a free mobile app for iPhone and Android.

30 percent of fatal crashes in California are a result of drivers with one or more drug in their system, studies show.

Funding for this DUI operation is provided to Stockton Police through a grant from the California Office of Traffic Safety, through the National Highway Safety Administration. Report drunk drivers by calling 911.