Officer Rob Sheffield, with the Reno Police Department, usually isn't allow the opportunity to target drunk drivers and somewhat ignore those breaking other traffic violations.
"Nights like tonight we like to get extra patrols out for specific reasons like the partying and keeping everybody safe."
He says the saturation of officers looking for drunk drivers keeps the roads clear, and the party's more enjoyable for everyone.
"As the night goes on, generally we have people who have started consuming alcohol earlier and they like to go home later and they continue to consume alcohol throughout the night."
The National Highway Traffic Safety Administration says nearly half of the traffic deaths that occurred last year on St. Patrick's Day involved drivers with a blood alcohol concentration of .01 and higher, most were over the legal limit of a blood alcohol level.
Officers Sheffield says they're out because they expect more drinkers who hit the road.
"Those numbers would be a little bit higher on St. Patrick's day. I would anticipate those numbers to be even higher tonight because it's a Friday night, a normal night where people aren't working tomorrow. So, where there used to going out and the holiday gives them a reason to go out and have a good time. We want people to go out and have a great time, but we don't want them to get behind the wheel of a car."