New Jersey State Route 94 is a north-south highway in Northern Warren County. It runs from the New Jersey/Pennsylvania State Line, at Columbia, to the Warren/Sussex County Line, near Newton. NJ St Rt 94 passes through the following towns in Warren County. Columbia Warrington Hainesburg Blairstown NJ St Rt 94 is not multi-plexed in Warren County. NJ St Rt 94 intersects the following highways in Warren County. U.S. Rt. 46, at Columbia. Interstate 80, at Columbia.