When a Spanish firm submitted a bid last year to help build the California bullet train, it cautioned that taxpayer money probably would be needed to keep the system operating.
Having reviewed data on 111 high-speed train lines around the world, construction giant Ferrovial said, it found that all but three could not make ends meet.
“More than likely, the California high speed rail will require large government subsidies for years to come,” the proposal said.
That warning, however, was expunged from the version of Ferrovial’s proposal posted on the state’s website. The only record of it was on a...