It shall be the duty of all persons operating trains of five cars or more, over, on or across public streets and highways within the city where such cars are being shoved or pushed ahead of the engine, to place on such train not less than four competent switchmen. The other members of the crew operating such trains within the city shall be stationed so that signals given by switchmen stationed on the end nearest the crossing may be properly conveyed to the engineer operating the engine shoving or pushing such train.
(1964 Code, § 31-30)