Where data does not flow
What we know is that the total amount of crude oil being shipped by rail in the US has roughly doubled over the last couple of years per the following EIA graphic. I am pretty sure the percentage increase in Pennsylvania is a much bigger jump than that and the % jump of oil moving through Pittsburgh even higher.
But there just isn't a lot of better data, which may explain why there is little other interest. If you can't measure it, is it really happening. There must be folks asking the same questions as me as this is posted on the EIA web site. They just don't collect data on crude by rail.. likely because it was just not a big flow not long ago.
What it means? I dunno, but worth noting. But if you don't know what I am talking about, just keep an eye out for trains like this that just were not common here in the past: