(A) The Board of Trustees may by ordinance or resolution prohibit the operation of vehicles upon any highway or impose restrictions as to the weight of vehicles, for a total period not to exceed 180 days in any one calendar year, when operated upon any highway under the jurisdiction of and for the maintenance of which the Board is responsible whenever any such highway by reason of deterioration, rain, snow or other climatic condition will be seriously damaged or destroyed unless the use of vehicles thereon is prohibited or the permissible weight thereof reduced. The Board shall erect or cause to be erected and maintained signs designating the provisions of the ordinance or resolution at each end of that portion of any highway affected thereby, and the ordinance or resolution shall not be effective until such signs are erected and maintained.
(B) The Board may also, by ordinance or resolution, prohibit the operation of trucks or other commercial vehicles or impose limitations as to the weight thereof on designated highways, which prohibitions and limitations shall be designated by appropriate signs placed on such highways.
(Neb. Rev. Stat. § 60-681)