Canadian National Railway says it brought in new safety measures following a fiery derailment near Edmonton in 2013 that forced more than 120 people from their homes.
CN is responding to a Transportation Safety Board report that says one of the derailed propane cars punctured, sparking a fireball and flames that burned for days.
The report says fractures and undetected defects in an old rail caused the cars to jump the tracks near the hamlet of Gainford.
The TSB says railways need to keep the surface of rails smooth or there is a risk that ultrasonic tests won’t detect flaws.
CN says new safety measures include walking inspections of sidings similar to Gainford and retests of all similar sidings across its rail system.
The company says it now grinds the rails used on sidings to keep them smooth and free of rust.
Last week, Ottawa announced it will bolster rail safety inspections, demand higher insurance liability from small carriers and create a disaster relief fund paid for by oil producers.