If you receive a traffic ticket in Pennsylvania, you must respond to the court within 10 days. You need to provide the court with your plea, whether you're pleading not guilty or guilty. If you fail to do so, the court, in many instances, would find a person guilty in their absence, guilty in absentia. In other words, it can also issue a bench warrant for the person's arrest. It would be a rare instance where a person should plead guilty. By pleading not guilty, it gives the person the opportunity to defend against the traffic offense, as to what would be best in terms of addressing the matter further.
Your interest would be best served by engaging with an experienced Pennsylvania Traffic Attorney. They can enter a plea of not guilty on your behalf with the court. They could take further steps with the police officer, the state trooper, potentially the District Attorney's office, and then the court, on the given court date, to work towards trying to get you the best possible outcome. They should be involved from as early as possible in the case.