§ 164. Hours of labor on street railroads. No employee engaged in the
operation of a street surface or elevated railroad of whatever motive
power owned or operated by a corporation whose main line or route of
travel lies principally within a city of the first or second class,
shall be employed more than ten consecutive hours, including one-half
hour for dinner, in any day, except that in cases of accident or
unavoidable delay extra work may be performed for extra compensation.