N.J. Stat. § 48:12-84
Whenever a railroad shall install any safety gates, bell or other device designed to protect the traveling public at any crossing, or has placed at such crossing a flagman, any person approaching any such crossing, shall, during such hours as posted notice at the crossing shall specify, be entitled to assume that the safety gates or other warning appliances are in proper order and will be duly and properly operated, unless a written notice bearing the inscription "out of order" be posted in a conspicuous place at the crossing, or that the flagman will guard the crossing with sufficient care whereby the traveler will be warned of any danger in passing over the crossing.
In any action brought for injuries to person or property or for death caused at any crossing protected as aforesaid, no plaintiff shall be barred of the action because of the failure of the person injured or killed to stop, look and listen before passing over the crossing.
N.J.S. § 48:12-84