The safety-service director is authorized to:
(A) Place and maintain traffic-control devices required by the traffic code and such other traffic-control devices as he shall deem necessary for the proper control of traffic.
(B) Establish safety zones of such kind and character and at such places as he may deem necessary for the protection of pedestrians.
(C) Place turning markers within or at the entrance to an intersection where traffic conditions are such as to require it. All operators of vehicles shall be governed by such markers.
(D) Mark lanes for traffic on roadways at such places as he may deem necessary for the safe and expeditious direction of traffic.
(E) Establish crosswalks at such places as he shall deem necessary, and shall designate them by appropriate marks or signs.
(F) The safety-service director shall have authority to close any highway or portion thereof to vehicular traffic, except that requiring access to, or egress from premises not accessible except by the highway. This authority shall be exercised only in cases where it is necessary or expedient to do so in order to provide safe places in which the children or residents of the neighborhood may play. These play streets shall be properly marked while so restricted. It shall be unlawful to drive any vehicle upon the restricted highway while it is so restricted, except as permitted by this section.
('73 Code, §§ 70.06 through 70.10, 72.50) Penalty, see § 70.99 (B) and (C)