It's not just the vehicles, its the shit they blather all over the roads as well.
Was driving home from work the other day approaching a right hand bend and all the cars in front started braking. A little further into the bend I could see why, a combine harvester had just pulled out of a field and was now straddling both sides of the road, merrily hurling great lumps of mud (the size of grapefruits) all accross the tarmac.
The fuckers just dont give a shit yet they are legally obliged to clean their wheels before entering the highway from a field and keep the road surface safe.
Worst thing is the next morning there had been a light shower of rain and all the mud had been spread about turning the road into a skid pan, anyone entering the bend at even a reasonable speed would have had heart failure!