N.J. Stat. Ann. § 39:4-55

The driver of a motor vehicle traversing a steep grade or mountain highway shall hold the vehicle under control and as near the right-hand side of the highway as reasonably possible, and when traveling upon a down grade upon a highway, shall not coast with the gears of the vehicle in neutral. When approaching a curve where the view is obstructed within a distance of two hundred feet along the highway, he shall give audible warning with a horn or other warning device.