New Jersey Statutes Title 39. Motor Vehicles and Traffic Regulation 39 § 4-112

Traffic control signals shall be so located as to be plainly visible to all traffic to be regulated and shall provide at least two indications for each approach at the intersection. At least one signal face shall give an unmistakable indication to traffic approaching, as well as passing through the intersection area. This shall be accomplished by means of posts, brackets, mast arms or cables so located that at least one signal face shall be to the right of, or over the traffic it is intended to control.