On Saturday, Eric Weiss, a spokesman for the safety board, said the agency would review the federal audit as part of the investigation into the crash.

A spokeswoman for New Jersey Transit did not respond to a request for comment.

Before the crash, the railroad administration had been considering other enforcement actions against New Jersey Transit, including a compliance agreement to require additional changes. Officials at the administration declined to comment on the audit on Saturday, citing the continuing investigation by the safety board.

The railroad administration completed a similar review of Metro-North Railroad in New York after a derailment in 2013 killed four passengers and injured more than 70 people. The review found that the railroad had a poor safety culture that prioritized on-time performance over protecting riders and workers.

On Saturday, federal investigators from the safety board were working to determine the cause of the Hoboken crash — the first fatal train crash on New Jersey Transit since 1996. The train’s engineer, Thomas Gallagher, was interviewed by investigators, officials said. They declined to provide details of the conversation.

Investigators could not remove the train from the crash site, officials said on Saturday, because of concerns over asbestos and the structural integrity of the building; part of the roof collapsed on to the train. Officials said they did not find any signal anomalies on the tracks leading to the terminal.