Why would it get dropped if he goes to an arraignment calendar? If Marietta City has separate arraignment and trial for moving violations, I'd assume most LARGER metro area courts would do the same thing (Mostly because it saves boatloads of time). If you go and plead not guilty there's every chance you'll get bounced to another court date for a real trial. Since you didn't post up where you got the ticket, you might just wanna go find out for yourself how the traffic court works in that Jurisdiction. It's different everywhere you go.