I can tell you exactly why, both from my experience as a lawyer and from personal experience.
You are summoned as a witness. If you don't testify, how can the prosecutor prove the case against the other driver? That's why you are necessary.
As far as WHY the other driver would fight the ticket, well, there may be several reasons.
First, a plea of guilty can be used as an admission of negligence in any civil case so, if you had been injured, a plea of guilty by the other driver would more or less give you a slam dunk on liability in any lawsuit for your injuries. It would also be used by your two insurance companies to determine who was at fault. A guilty plea means the at fault driver is going to be determined to be 100% at fault, rather than ascribing some blame upon you.
Second, tickets and the pleas to them can impact insurance premiums. Simply, the other driver doesn't want his/her premiums to go up, so you have to show up to force him or her to plead guilty (or go to trial and lose).
If you were hurt, get checked out by a doctor and contact a personal injury lawyer and discuss with that lawyer how to handle the ticket.
If you were not hurt, then you should appear in court, advise the prosecutor you are there, and wait to see whether you are needed to testify.
I was involved in an incident similar to yours, and I also had to show up in traffic court as a witness. My appearance "forced" a plea of guilty.
I hope this helps.
Stephen L. Hoffman
Law Office of Stephen L. Hoffman LLC
Chicago, IL
773-944-9737
Email:
[email protected]
Website: www.hofflawyer.com
Blog: www.hofflawyer.com/blog/