This would be part of your city's municipal code it sounds like. About keeping junk vehicles and other such items on your yard that make it an eyesore and the community unfavorable. I know the city I work in will fine you if you park your car on your grass, or if you let your yard turn into a...
When you receive a citation, and you sign it, you are promising to appear to court to either plead guilty or not guilty to the charge, in your case speeding. You can avoid going to court by paying the bail amount of the ticket (base fine that is sent to you in the mail, if your jurisdiction...