There is a little more to this one than this article. It's been a while since I read the earlier parts of the docket; but I believe that the way the tracks are in Laredo, to pull the trains into the USA and to inspect them meant a two hour fouling of some crossings that the locals were raising hob about, and that while I suppose bridges and other such could be built to alleviate that, I seem to recall the engineering is not as easy as that. And the FRA would not allow the trains to get to the next large enough yard to do the inspections.
This does not diminish the newspaper piece, which is a classic of yellow rhetoric (even if what it says is true), and this is not to say that the UP is perfect here, but there is more to this story than this article.
Steve Zuiderveen