NEW YORK — US transportation officials ordered the Metro-North Railroad on Friday to quickly overhaul its signal system and temporarily put an extra worker in the driver’s cab on some routes that have major speed changes, including the one where a speeding commuter train derailed this week, killing four people.
The emergency order by the Federal Railroad Administration was a reaction to Sunday’s wreck in the Bronx, where a train flew off the tracks after hitting a curve at 82 miles per hour, nearly three times the 30-mile-per-hour speed limit. The lone train operator told investigators he nodded off at the controls and didn’t apply the brakes until it was too late.
There was no system in place to ensure he didn’t miss the spot where he had to slow down as the curve approached. Full story for BostonGlobe.com subscribers.