All persons shall heed and comply with the directions of any police officer indicated by gesture or otherwise in using parks or park streets and shall further comply with directions on traffic signs along the routes in the parks and along park streets. Directions on such traffic signs may be disregarded only on an order of a police officer. In parking spaces, all persons shall comply with the directions of a park employee. ('74 Code, § 94.26(B)) (Ord. 71-11, passed 12-6-71) Penalty, see § 93.99