The rule seems a little crazy, but I doubt it has been levied at the sight of any spec of dirt on a road.

Im sure it is there to keep large chunks/amounts and carelessness down. Its dumb to think a truck driver will not track any mud, but I have seen plenty of truck drivers carry out half a yards worth of soil and deposit it on the road.

And if I am paying that much for a house and HOA cost, I sure as hell do not want some careless person leaving crap all over the roads. Thats the difference between living in gallardia and anywhere else in the city.