Location. The lot upon which a proposed conditional use is to be located must be a minimum distance of 1,000 feet from any of the lots upon which there is located a hospital, sanitorium, nursing home, church or other similar place of worship, including accessory buildings incidental thereto, public or private college or university, library, public school or private school having a curriculum approximately the same as ordinarily given in public schools or other similar places of public assembly; provided, however, that if the lots from on different streets, the minimum distance of 1,000 feet between lots shall be measured by the shortest route along the public streets upon which each lot fronts.