It is unlawful for any person to drive, ride or propel, or cause or permit to be driven, ridden or propelled, any vehicle in the canyon at a speed exceeding posted speed limits or is too fast for existing conditions or is greater than is reasonable and safe, or so as to endanger life, limb or property in any respect whatever, or upon approaching any bridge, sharp curve, dugway or descent, or traversing such bridge, curve, dugway or descent, to fail to have such vehicle under control at all times. (Ord. 50-93 § 2, 1993)