The San Diego Police Department announced it will set up a DUI and license checkpoint somewhere in the city limits on Friday night.
Officers will be stopping cars and checking drivers for signs of alcohol and drug impairment from 11 p.m. Friday until 3 a.m. Saturday.
Traffic safety officials are increasingly focused on marijuana, which is now legal in California, because it can impair drivers, especially in combination with alcohol.
The checkpoints are regularly announced in advance because of the deterrent effect on people who may drink or take drugs and drive.
Over the past three years, San Diego Police have investigated 2,381 DUI collisions that claimed 19 lives and caused 2,257 injuries.
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