The price of the California bullet train project jumped sharply Friday when the state rail authority announced that the cost of connecting Los Angeles to San Francisco would be $77.3 billion and could rise as high as $98.1 billion — an uptick of at least $13 billion from estimates two years ago.

The rail authority also said the earliest trains could operate on a partial system between San Francisco and Bakersfield would be 2029 — four years later than the previous projection. The full system would not begin operating until 2033.