The County Sheriff and his or her officers are hereby authorized, empowered and ordered to exercise all powers and duties with relation to the management of street traffic and to direct, control, stop, restrict, regulate and, when necessary, temporarily divert or exclude, in the interest of public safety, health and convenience the movement of pedestrian, animal and vehicular traffic of every kind in streets, parks and on bridges. The driver of any vehicle shall stop upon the signal of any police officer.
(Neb. Rev. Stat. § 60-683) (Prior Code, § 5-201)