My clean car covered in dust !!

I have just washed my car - it so clean and shiny you need to wear shades when you look at it.
It was so clean infact , that I was surprised when I looked at it this morning , I thought pixies had delivered me some new wheels whilst I was having my kip . I was in a very jovial mood when I dropped the sprogg off at school happily singing along to the wireless , looking all proud in my shiny fiesta , that is until I turned onto Old Jhb road....... Taxis driving on the wrong side of the road,you know them , laws are'nt meant for these okes, started kicking up so much dust that my car is no longer clean. It is now a hazy kotchellow (Kotch and yellow) colour .Who do these guys think they are - is it just me !!!
I find that very hard to believe. Aaaarghhh!!!!! Close the vents - because dust is now being sucked in and I have started coughing like some demented smoker ; and I dont smoke.........
I cant see were I'm going and my good mood is a distant memory. COME ON ........ when is this going to stop ??????