Speed control system ’could have prevented fatal Amtrak train crash’

Speed control technology which could have prevented a fatal train derailment near the US city of Seattle was not active at the time of the crash, authorities have said.

Work to install the GPS-based system known as positive train control is not expected to be completed until next spring on the newly opened 15-mile span where the Amtrak train came off the tracks, killing three people and injuring dozens more, according to Sound Transit, the public body which owns the line.