It shall be the duty of every person having charge of, driving, or operating any vehicle on or along any street in which any railway track is laid within the City to travel or pass only on the right hand side, between the curb stone and the track of the railway, except: when prevented by some obstruction in the street; or when it shall be necessary, for any sufficient cause, to cross or pass over such railway track to the opposite side. City Code, 1879, art. 40, §8 1893, art. 41, §8 1927, art. 39, §8 1950, art. 29, §6 1966, art. 20, §6 1976/83, art. 20, §6 Rev. Ords. 1858-034 Ord. 48-479