STAMFORD - Federal officials say they are cracking down on safety regulations in the wake of the fatal Metro-North train derailment in the Bronx.

The Federal Railroad Administration says it has ordered the MTA to impose emergency speeding bans along the Metro-North line.

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The railroad's trains will also have to have two qualified operators in the cab of every train that travels in areas where there are speed restrictions.

Engineer William Rockefeller was the lone operator of the Metro-North train that derailed Dec. 8 while traveling 82 mph on a 30 mph curve. Four were killed and 60 others were hurt when the train went off the tracks near the Spuyten-Duyvil station in the Bronx.