Thank you for your comment plackett!
Well, I don't know how it really works in real life, but in the article I found regarding the theme (http://cwmi.css.cornell.edu/roadkillfs.pdf) it was said that this service was actually hired and paid "a good money"!
Regarding the side of the street in which to drive, I laughed when I read it, because it has never crossed my mind! I really wouldn't know, so it's up to you to decide (I personally drive all around like a maniac in the game so...)!
And the Timer needs to be better tunned for sure! Maybe even a "day/night" effect... but that's for the future!
Thanks again!