N.J. Stat. § 27:23-28: Traffic control; signal.

4. All persons operating vehicles upon any such highway project must at all times comply with any lawful order, signal or direction by voice or hand of any police officer engaged in the direction of traffic upon such project. When traffic is controlled by traffic lights, signs or by mechanical or electrical signals, such lights, signs and signals shall be obeyed unless a police officer directs otherwise.

L.1951,c.264,s.4; amended 2003,c.79,s.32.