HARRISBURG — Gov. Tom Corbett is preparing to unveil a transportation plan funded primarily by nearly $2 billion a year in new taxes on gas stations, two people who learned details of the plan told The Associated Press on Wednesday.

The Republican governor, who pledged not to raise taxes when he ran for office, will announce the fine points of the long-awaited initiative next week.

Corbett spokesman Kevin Harley said the tax would not be paid directly by consumers.

“How is he raising taxes?” Harley said. “I’m curious how he’s raising taxes?”

The centerpiece of the plan would involve removing a statutory cap on the oil company franchise tax and would require approval from the state Legislature.