MADISON, Wis. -- The Dane County Sheriff's Department said it will have additional deputies on the roads this holiday weekend.

Sheriff's Department spokeswoman Elise Schaffer said deputies will be focusing on speed, alcohol and seat belt violations, which she said are the top contributors to traffic injuries and deaths.

Grant dollars from the Department of Transportation are funding the extra patrols. Schaffer said the grant deployments will include five additional deputies working OWI patrols on Saturday night, as well as deputies working speed enforcement grants.

Officials said law enforcement agencies throughout the state will be out in force this weekend to crack down on drunken driving, as part of the state's "Drunk Driving. Over the Limit. Under Arrest" campaign, which continues through Sept. 6.

"It is the most deadly from an alcohol-related standpoint from all the holidays that we have, believe it or not, and that's why we've saturated so much enforcement, and we're trying to get the message out because it is traditionally the worst one of all of them," said Dan Lonsdorf, of the Wisconsin State Patrol.

Authorities said drivers should remember to abide by the Move Over Law whenever they see an emergency vehicle on the side of the road.

Meanwhile, AAA estimates that the roads and the skies will be a little busier this Labor Day weekend.

AAA officials projected a jump in travel of 9.9 percent over last year, with 34.4 million people traveling at least 50 miles from their homes. Last year, 31.3 million Americans traveled during the holiday weekend, which is defined this year as Sept. 2-6.

More than 734,000 people in Wisconsin are expected to travel this year -- an increase of 10.8 percent over last year, officials said. The majority -- about 688,000 travelers -- will move by car despite gas being 33 cents more per gallon than it was in 2009. An estimated 19,000 people will travel by air, they said.