Section 1. The section of Route 225 (Legislative Route 336) in Northumberland County between Range Station 849 + 56 near the intersection of Route 61 City of Shamokin and Range Station 1210 + 01 in Zerbe Township shall hereafter be known and shall be designated and posted, at least at either end, by the Department of Transportation as the Corporal David William Witmer Memorial Highway.