Truck driver here as well. The amount of literal stupidity we have to deal with is over the top. Now, not understanding the ditto marks is one thing, but I also had a dispatcher be angry at me because he thought I was able to cross a river on a ferry with max allowed weight of 5 tons, whereas I had a big rig and couldn't possibly go on that ferry. The only road I could take added about 1 hour to my route and he called me yelling at me why it takes me an hour for a 5 km stretch of road. I asked him if he sees a blue line on whatever map he's looking at. He said yes. I asked him if he knows what it means. He said a river. I asked him if he knew which button to press to turn my truck into a boat and he dropped the call and didn't speak to me again.