It shall be unlawful for any person to ride, propel or park any automobile, motorcycle, wheelbarrow, handcart or other vehicle upon any sidewalk, except as may be necessary in entering or leaving the premises or buildings. This section shall not apply to children under the age of 12 years who may ride bicycles and tricycles on residential sidewalks, other than in the Main Business District, at a speed less than 15 miles per hour.
('86 Code, § 15.207) Penalty, see § 10.99