No gasoline filling station, automobile repair shop, public garage or parking lot shall have an entrance or exit for vehicles on the same side of the street within thirty feet (30') of a residence zone, nor shall any part of a gasoline filling station, public garage or automobile repair shop be within fifty feet (50') of the grounds of any school, public playground, church, hospital, sanatorium, public library or institution for dependents or for children. (Ord. 168)