Vehicles operated in any park or playground in the city shall be operated only upon:
A. Paved or gravel surfaced roads which are not closed to use by the public for vehicular traffic;
B. Dirt or unimproved roads marked or otherwise designated for vehicular traffic;
C. Paved, graveled or otherwise designated picnic or parking areas with operation limited in such areas to parking and ingress to and egress from such areas for picnic or parking purposes;
D. Other areas designated in written permit issued by the director.
(Res. No. 19 93-94 §7 (part)) (Res. No. 31-13 §38)