Lesser charges, including misdemeanor hit-and-run, failure to render aid in an accident and failure to report an accident, will be dropped, according to the plea deal. Unser's blood-alcohol percentage was almost three times the legal limit when he was arrested Jan. 25.

"It was an unfortunate mistake, but he's learned from it," lawyer Andrew Leavitt told The Associated Press, speaking on behalf of Unser, of Henderson. "He's a recovering alcoholic. He hasn't had a drop of alcohol since this happened."

Clark County's chief deputy district attorney, L.J. O'Neale, said a breath test shortly after the 10:45 a.m. crash put Unser's blood-alcohol content at 0.22 percent, well above Nevada's legal limit of 0.08 percent. Unser also failed field sobriety tests.

"Even the most skilled drivers in the world can't drive well when they're drunk," O'Neale said.

He called the plea deal "a standard agreement" and said the 45-year-old Unser will be allowed to submit a written plea to a Henderson judge through his lawyer.

Unser will automatically lose his driver's license for 90 days. He will be fined the maximum $1,000, and have to attend a drunk driving school, a victim-impact panel and undergo alcohol abuse evaluation, O'Neale said.

"He got no special treatment," O'Neale said.

The Nevada Highway Patrol said Unser was driving a black Ford Excursion that sideswiped a Mazda sedan, which crashed into a cement median. The driver of the Mazda reported no injuries at the scene, the NHP said.

A witness followed Unser's vehicle before Henderson police stopped it a short time later.

Leavitt said Unser has been attending Alcoholics Anonymous meetings daily since January, and has performed more than 100 hours of community service on alcohol treatment related causes in recent months.

Unser is the son of Indy 500 racing legend Al Unser, and the nephew of three-time Indy winner Bobby Unser. He won the Indy 500 in 1992 and 1994, and won two CART points titles and two IROC championships.