New Jersey Statutes Title 39. Motor Vehicles and Traffic Regulation 39 § 4-98.9

a. Notwithstanding any other provision of law to the contrary, the commissioner is authorized to set or change by emergency order, for periods of up to 60 days, the speed limit on any public highway based on emergent conditions, such as construction work, dangerous conditions, extreme congestion or traffic problems, imminent peril, or imminent risk to motorists or to the public safety.

b. An emergency order issued pursuant to this section shall cite the portions of public highway to which it is to be applicable, a description in plain language of what the order requires, the effective date of the order, and any other information the commissioner deems necessary.

c. An emergency order issued pursuant to this section shall be final upon the signature of the commissioner, or on a later date if the commissioner so determines, and shall be effective and enforceable upon compliance with the requirement for the posting of signs providing notice of the speed limit, as provided under the applicable provisions of R.S.39:4-98 and R.S.39:4-198.

d. An emergency order issued pursuant to this section may, upon its expiration date, be renewed by the commissioner for additional 60-day periods, until the emergent condition necessitating the emergency order is mitigated.

e. Any official traffic control device established pursuant to this section shall conform to the “Manual on Uniform Traffic Control Devices.”