N.J. Stat. Ann. § 26:2C-8.57

1. No person shall retrofit any diesel-powered vehicle with any device, smoke stack, or other equipment which enhances the vehicle's capacity to emit soot, smoke, or other particulate emissions, or shall purposely release significant quantities of soot, smoke, or other particulate emissions into the air and onto roadways and other vehicles while operating the vehicle, colloquially referred to as "coal rolling." Any person who violates this section shall be subject to the penalties established pursuant to section 27 of P.L.2005, c.219 (C.26:2C-8.52) and any other applicable law.