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SACRAMENTO, Calif. (AP) - Gov. Jerry Brown's administration is petitioning the California Supreme Court to overturn two lower-court rulings that have stalled progress on the state's high-speed rail project, one of the nation's most expensive public works projects.

A petition filed late Friday seeks an expedited review and asks the court to overturn two decisions that prevented the state from selling $8.6 billion in voter-approved bonds. The lower-court rulings also require the high-speed rail authority to write a new financing plan.

The governor, the rail authority and the state treasurer argue that the rulings prevent California from quickly starting construction on the $68 billion project. They also say it could hurt California's ability to finance other voter-approved projects.

A judge last year sided with opponents who claimed the state failed to comply with the promises made to voters when they approved Proposition 1A in 2008.