Dont know how anyone nanaged to drag one more than a few feet. Even empty our DAFs struggle although did get one about 5 feet when empty the other day and zero feet when loaded.
Think Lucy should teach drivers as an after you pass course with course titles such as “101 ways to get away with it”. (Could be a new article). 
As for the marks on the road - that shows where the poor drivers who get crappy trucks (DAF CF) swore about getting a better job like one with a Volvo!