It is unlawful for any person or persons, corporation, or company to move or cause to be moved, on any railroad track leading through any of the streets of the City, more than 2 railroad cars in connection without the aid of propelling power. City Code, 1879, art. 40, §9 1893, art. 41, §9 1927, art. 39, §9 1950, art. 29, §7 1966, art. 20, §7 1976/83, art. 20, §7 Rev. Ords. 1858-034 Ord. 48-479 Ord. 99-526