Typically it is aisle traffic. Sometimes the trucks have a load, sometimes they don't. In many cases, there has been 20ft or more between the column and the next obstacle. I'm going to try the suggestion of marking out the floor around the column in a few spots and see what kind of feedback I get from the operators.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.