This Thanksgiving, they'll be on high alert and the lookout for dangerous drivers.
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"Looking for those people out on the roadways causing the most harm, such as speeding, distracted driving, and those driving impaired," said Officer Mark Salas.
Officers will be out through their Maximum Enforcement Period. Last year, they were successful in making over 900 DUI arrests statewide -- about 40 of those were made locally.
"From Modesto to Bakersfield, our local central area, we had 162 DUI arrests," Salas.
Since marijuana became legal in California officer Mark Salas says they've seen a 180% increase in DUI arrests.
Crashes have also gone up, just in the last month, they have had three fatal collisions involving drivers who were high.
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"Mixing marijuana with driving is just as deadly as DUI driving," Salas said.
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With rain in the forecast, Salas is urging people to be prepared, especially those driving far.
"Make sure that your car is properly equipped, those windshield wipers are running, those headlights are working, and you have plenty of tread on your tires," Salas said.
CHP also wants to remind people to wear their seat belts.
During last year's Thanksgiving enforcement, 18 people lost their lives by not buckling up.
The Maximum Enforcement period starts Wednesday and ends Sunday at midnight.
CHP plans on having at least two more before the year comes to a close during the week of Christmas and the New Year.