It shall be unlawful for any person to drive or cause to be driven a vehicle of any description in or upon any portion of the highway immediately after the same has been dragged, and before that portion of the highway shall have partially dried out or frozen; provided, that nothing in this section shall apply in those instances where it is impossible to drive with safety at one side of the dragged portion of the road, or where a vehicle does not make a rut on the dragged portion of the road, injurious to the work accomplished by use of the road drag, or where a vehicle does not make a rut nearer than 9 feet from the center of the dragged portion of the road.
(ILCS Ch. 625, Act 5, § 11-1417) Penalty, see § 70.999