Last year, Canada exported a record amount of Tar Sands oil to the U.S., despite low oil prices leading to major losses once again for the struggling tar sands industry. That achievement required a big bump in hauling oil by rail, with those daily volumes in late 2018 more than double the previous record in 2014 during the first oil-by-rail boom.

Canada's oil industry essentially has reached its limit for exporting oil into the U.S. through pipelines. That's why it's turning to rail to export more and more oil, but as an ever-increasing number of oil trains hit the tracks of North America, expect more accidents and oil spills to follow.