Hi Richard. I agree with bizaro86. The oil industry in Canada has been significantly impacted for awhile, due partly to the current low price per barrel. This is further affected by the reduced demand, not only domestically but internationally, with so many people not travelling and/or working from home.
Rail is often a "secondary" method of oil transportation, when pipelines are already at capacity. As the oil sands production increased, they started working to expand the pipeline network and capacity. But with less demand, there is less need for rail shipments. In any case, rail transport of petroleum products has traditionally represented less than 10% of total rail shipments in Canada. Grain and agricultural products typically account for more than double the rail tonnage of oil. Nevertheless, it still has a significant impact on the railways and their profitability, plus those companies that own or lease oil cars or are involved in the transport of oil by rail.
The most recent statistics I could find from Statistics Canada cover the period from 2014 to 2018. The chart below shows the amounts by sector, transported by rail, in metric tonnes.
Edited: Thanks, Richard. The link works now.