I don't think the issue is that a truck is on the side of the road. It's a late model "mud truck". The mud trucks that I've seen are usually pretty beat up and completely covered in mud.
One thing that the original post left out was how long the mud truck was parked on the street. A visitor leaving it there for a few days is one thing, but for the city to send someone out I'm guessing it was there for much longer.
It takes a lot of hard work for someone to make their house and yard look nice. It takes lots of people working hard to make a neighborhood look nice. All it takes is one eyesore to ruin it.
Like I said, the solution is pretty simple. Wash the truck, park it in the driveway or yard. Living in a big neighborhood requires consideration of your neighbors.