CSX Corp.’s signaling system on the stretch of railroad track where a deadly train collision occurred on Sunday was being upgraded for an electronic safety system called positive train control, which federal investigators say could have averted the crash had it been in place and operational. Because the current signaling system wasn’t in operation because of the upgrade, a CSX dispatcher authorized Amtrak Train 91 to operate in the area south of Columbia, S.C., National Transportation Safety Board Chairman Robert Sumwalt...

Source: Wall Street Journal February 06, 2018 01:07 UTC