N.J. Stat. § 40:67-16.9
The governing body of any municipality may, by ordinance, authorize the mayor or other chief executive officer of the municipality, or the officer, in charge of streets in any municipality not having a chief executive officer, to provide by regulation for the closing of any street or portion thereof to motor vehicle traffic on any day or days or during specified hours on any day or days whenever he finds that such closing is necessary for the preservation of the public safety, health or welfare. Such ordinance and regulations promulgated thereunder shall provide for the posting of proper warning signs of such closing in any street or portion thereof during the time the same is closed in pursuance thereof and shall provide penalties for the violation of such ordinance or any regulation promulgated thereunder.
N.J.S. § 40:67-16.9