It is unlawful for any person to coast or slide with any sled, sleigh or toboggan or vehicle on any public street in the city, or draw or cause to be drawn by any motor vehicle any sled, sleigh or toboggan upon any public street, avenue, sidewalk or alley within the city; provided, however, that the mayor, by public notice or proclamation may authorize the use of certain streets, avenues or alleys for coasting during the winter season, and during such period, the street will be closed to traffic, and when so closed it is unlawful for any person to enter such street with any horsedrawn or motor vehicle. (1989 Code: prior code § 12-9-3)