San Francisco police ramp up overnight DUI patrol

San Francisco police will be conducting overnight DUI saturation patrols Saturday, the department said.

The patrols will take place between the hours of 7 p.m. and 3 a.m., police said.

Saturation patrols are not the same as DUI checkpoints. The patrols, sometimes called roving police patrols, deploy additional police patrol cars to targeted roads during select time periods to detect and apprehend drunk drivers.

According to the department, crashes involving an impaired driver can be reduced by up to 20 percent when well-publicized DUI checkpoints and proactive DUI patrols are conducted routinely.