Law enforcement will be out in force to combat drunk driving on Super Bowl Sunday, a day that officials say has become increasingly dangerous on the roadways because of heavy drinking.

Thirteen agencies, including Sonoma County jurisdictions and the California Highway Patrol, will deploy "saturation patrols" that target people who appear to be impaired while driving.

"Our safety message is fans don't let fans drive drunk," said Petaluma Police Chief Dan Fish. "Designate a sober driver before the Super Bowl party begins and leave your car keys at home."

Although the Super Bowl, which begins mid-afternoon on Sunday, is popular for socializing with family and friends, it has become one of the nation's most dangerous days on the road because of alcohol-impaired drivers, police said.

During Super Bowl Sunday in 2009, 11 people were killed in California and another 133 injured in alcohol-related collisions, police said. That is three times the average number of people who die daily on California roadways.

<CF102>— Bleys W. Rose