Definitely contact the court by phone or something. I would lay odds that it is highly preferred that you settle you situation with them by paying any fines or adhering to any judgments rendered by the court. Jails are over crowded all over the place and I am certain California is in a similar situation. They'd prefer to reserve the jail space for the real bad guys as opposed ot someone who failed to pay their traffic-related fines.
I doubt they'll send a SWAT team to come and get you or anything like that! BUT, if you leave it lay and don't take care of it and if you get stopped by police, you could end up going to jail. It definitely won't "go away" and you'll have to deal with it one way or another.
Contact the apppropriate court about this and take care of it.
Charlie
"Good and evil are present in this world, and between the two there can be no compromise" - President George W. Bush, in his farewell address to the nation.