A drunken-driving arrest in California took a surprising turn when it emerged that the suspect was driving a car that warned against drunken driving.

The driver had been weaving across lanes on Interstate 80 around 4 a.m. Sunday, according to California Highway Patrol's Oakland bureau.

The advertisement on top of the vehicle, from the National Highway Traffic Safety Administration, read: "I should probably get a ride home" (with "probably" crossed off). It also said, "Buzzed driving is drunk driving."

"Ironic for someone driving drunk with a sign encouraging not to drink & drive," highway patrol wrote.

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The unnamed driver's blood alcohol limit was past the limit, Officer Herman Baza told Bay City News. He said that the highway safety administration pays people to display the anti-drunk driving signs.

"It's a good message, but he's not necessarily the best role model," Baza said. "He was weaving all over the place. We caught him early enough that we prevented him from crashing."