Since the Seahawks were eliminated in the divisional round of the NFL playoffs this year, there probably won't be quite the level of interest in the 2016 Super Bowl as there was a year ago when Seattle faced New England. Still, that won't stop cops from closely watching for drivers who appear to be impaired.
You can probably expect additional police patrols in King, Pierce, and Shonomish counties on Super Bowl Sunday (as well as early Monday morning). These are the areas which law enforcement agencies generally target when looking for people who are driving under the influence of alcohol or drugs. According to the Seattle Police Department, an average of about 48 people are arrested in those three counties each year on Super Bowl Sunday. But that doesn't mean that police will ignore other parts of Washington.
Cops know that a lot of people travel to bars or private homes for Super Bowl parties, and that alcohol is a staple at most of them. So you can bet that they'll be keeping a sharp eye out for erratic driving, traffic violations, or other signs of impairment beginning Sunday evening. (The good news is, the Seattle-area weather will likely be pleasant this weekend, meaning that residents won't have to navigate rainy or snowy conditions while driving).
The best course of action is to observe all the usual safety precautions: drinking responsibly, eating some food to offset the impact of alcohol, and designating a driver or arranging alternate means of transportation if you drink. But if you do happen to be arrested for and charged with DUI, be sure to contact a qualified DUI defense attorney to handle your case.