(Des Moines) The National Transportation Safety Board says crew fatigue is the probable cause of the deadly train collision that happened near Red Oak, just over a year-ago.
A BNSF Railway coal train slammed into a standing BNSF train near Red Oak on April 17, 2011. The engineer and conductor on the train died.
The transportation board said Tuesday that both members of the crew had fallen asleep and failed to comply with a signal requiring them to operate at a restricted speed and stop short of the standing train.
NTSB Chairwoman Deborah Hersman said the investigation draws attention to the dangers of human fatigue.
The board says other factors contributed to the accident, including the absence of a system that identifies the rear of a train and stops the approaching train if a safe breaking profile is exceeded.
April 25, 2012
6:00 a.m. newscast