It shall be unlawful for any person to ride or drive any animal, or to drive any vehicle over any newly paved street, venue or alley in the city before such paving shall have been accepted by the city, and before the same shall have been formally opened by the city for public travel thereon. Provided, the contractor or other person having charge of such paving shall erect and maintain barriers at the end of the streets, avenues and alleys on which such paving is being done, as well as at all street intersections thereon. (1986 Code § 19-17)