Permission is granted to children under 12 years of age and
to persons who are invalids or cripples to use bicycles or other vehicles
propelled by hand upon any public sidewalk intended for use by pedestrians.
Public rights-of-way as set forth in Schedule XXII (§
325-74) shall hereinafter be closed to vehicular traffic and open solely for pedestrian use which excludes all trucks, equipment, automobiles, bicycles, snowmobiles and all other vehicles, whether mechanized or driven by hand or foot. The foregoing shall not apply to children under 12 years of age nor to persons who cannot walk by reason of being an invalid or crippled.