No person shall run, propel or operate any railroad car or train of railroad cars upon, along or across any street or across any railroad track, interurban railroad track or street railway track, during the period from one hour before sunrise to one hour after sunset, unless a competent flagger shall proceed in advance of such car or train or shall be upon the end thereof toward which such car or train is proceeding. This section shall not apply to any car or train if a locomotive is attached to the end thereof toward which such car or train is proceeding.