§ 74.042  ROAD OIL VEHICLES; DRIPPING ON CERTAIN HIGHWAYS FORBIDDEN.
   No person shall operate on a durable all-weather highway of a type other than gravel or crushed stone, any vehicle used for the purpose of applying road oil, liquid asphalt, or similar material to road surfaces unless the vehicle is so equipped as to absolutely prevent the material from dripping on the highway, nor shall the material be allowed to drip on any such highway.
(ILCS Ch. 625, Act 5, § 12-703)  Penalty, see § 70.999