Thank you.

At this point, you cannot claim that you did not do this, since you obviously did. Ergo, your best claim here is that the sign is unclear, and that no reasonable driver would have taken this sign to mean that you could not drive down that road due to:

-it being in a strange place that is not reasonably clear that it pertains to that street,
-the way it was facing, and
-the way the other streets around it were laid out.

Truth be told, this is a case by case basis. Under Section 3111, this means that you disobeyed "the rules of the road." So individuals in your situation can argue that the rule was unclear.

Total fine costs if convicted are about $109 and no points on license.

Before you go to court, make sure to take photos/video of the sign from different angles afar and close to introduce in court as evidence!

I hope this finds you well. Please click Reply to Expert to keep talking, or rate my answer when we are finished. Kindly rate my answer as one of the top three faces because this is how I get credit for my time with you. Otherwise, reply to chat more until we are finished and you are ready to rate. I work very hard to formulate an informative answer for you; please reciprocate my good faith. (You may always ask follow ups free after rating.)