No way in hell should you plead not guilty....If you plead not guilty the judge may take the case straight to trial with little opportunity to explain yourself....Driving the wrong way is a felony in some states especially if there is intent....Plead guilty and the judge may let you explain yourself and reduce the charge....this ticket may have u by the gonads...pray hard until it lets go....$750 may be a small charge to see this taken care off