COLUMBIA, S.C. (AP) -- The director of South Carolina's transportation department has resigned following a drunken driving arrest.

Robert St. Onge resigned Friday, citing personal reasons. Gov. Nikki Haley notified legislative leaders in a letter obtained by The Associated Press that Christy Hall will be acting secretary until she finds a permanent replacement.

The Lexington County Sheriff's Department website says St. Onge was arrested Friday and charged with driving under the influence first offense. A sheriff's spokesman did not immediately return messages.

Haley named the retired Army major general to lead the transportation department in January 2011. The 66-year-old retired in 2003 after 34 years in the Army.

St. Onge has often said his job is to manage the decline of the state highway system.

No one answered the phone Friday at his home.

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