The cost will go up, up, up. The court to which the ticket was referred will dun you and ultimately submit it to a collection agency which will further cause the cost to rise. The court will likely submit it to DOL which will put a hold on your registration so the next time you need to register your car, you won't be able to until you pay it off or work out a schedule with the court or the collection agency. If it's not your car, then the person you borrowed it from will beat you up. Your license will not be suspended; that's for ignored moving violations.
Courts will work with you. You can even get community service hours in lieu of a fine. Ignoring is ignorant.