No mail. They get you for court cost, and dont have to worry about the mass amount of mail they would get if they were to do things by mail. Not to mention all of the people that would never use it anyways just to try and use the "I never got it" excuse
Somewhere either on the back of one of the ticket carbon copies, or an attatched report, should be a written statement of what happened. Something along the lines of "On stated date and time, Plane x was travelling x bound on xx(highway), observed a xxxx (vehicle color /desc.) travelling at what appeared to be a high rate of speed. Calculations of xx were taken from point x to point x. blah blah.." something like that
I have an ORC book if you need something looked up