No person shall drive a motor vehicle within any park area at a speed greater than 15 miles per hour or as otherwise posted, having due regard for traffic on, and the surface and width of the road, and in no event at a speed which endangers the safety of persons, property, or wildlife; provided, however, that in no event shall a vehicle be driven at a speed greater than 15 miles per hour in picnic, utility, or headquarters areas, or in areas of general public assemblage. [Ord. 126 § 1, 1997.]