No person shall drive on the shoulders of highways, except that:
(1) Vehicles may be driven on the shoulders of highways (a) by federal mail carriers while delivering the United States mail or (b) to safely remove a vehicle from a roadway;
(2) Implements of husbandry may be driven on the shoulders of highways; and
(3) Bicycles and electric personal assistive mobility devices may be operated on paved shoulders of highways included in the state highway system other than Nebraska segments of the National System of Interstate and Defense Highways.