Transport Canada finalized guidelines on risk factors for trains operated by a single person just months before the disaster in Lac-Mégantic.
They included more than a dozen "human factors" such as amount of sleep, health, age, lifestyle and workload demands — and the best way to deal with them.
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The guidelines, finalized in May 2013, were intended to help Transport Canada staff evaluate risk assessments filed by railways operating trains with just a single employee.
In July of last year, a 72-car train that had been parked for the night rolled into Lac-Mégantic and derailed, creating a fireball that killed 47 people, destroyed buildings and contaminated waterways.
The now-defunct Montreal, Maine and Atlantic Railway and three employees — including the train's sole operator — face charges of criminal negligence causing death.
The Transportation Safety Board is set to release its final report tomorrow on the devastating accident, including the railway's use of a one-man crew.
CBC News will have live coverage of the TSB news conference online and on CBC News Network Tuesday at 10:30 a.m.