It stands for Pennsylvania Vehicle Code section 3111, which deals with obeying traffic control devices (traffic lights and signs of any kind, basically, failure to obey the rules of the road). The police officer did cut you a break by citing you for a 3111, it carries no points on the license. I recommend you pay the fine, but you can go into the court and challenge it. If the officer is there and tells the judge he already cited you for a lesser offense, you probably won't get your fine lowered.
PENNDOT's website has a downloadable PDF which explains the points system and lists some of the ways in which you can get points on your license.
Best of luck,
Shannon K. McDonald
The officer was telling you the truth because 3111a doesn't carry any points. It is probably best if you just pay the fine. Although you do have the option to contest it, but would be unlikely to get a better deal or get the ticket thrown out.
Yes he is telling you the truth. You will not get a better result unless the judge finds you not guilty.
John M. Walsh, Esquire
Law Office of John M Walsh
2101 Pine St
Philadelphia, PA 19103