Wherever any railroad track shall cross at-grade any paved street or highway within the city, the person maintaining such track shall pave the space between the rails and for a distance of one (1) foot outside of the rails, with creosoted wooden blocks laid upon a plank base and covered with Tarvia. Such work shall be done under the supervision and direction of the Director of the Department of Public Works.
Existing crossings which, in the opinion of the Director of the Department of Public Works, are in good repair need not conform to the terms of this Article until such time as, in the opinion of the Director, they shall require repairs or replacement and notice to that effect has been given to the party maintaining such track and a period of thirty (30) days after the giving of such notice has elapsed.