If the Council declares an embargo when it appears by reason of deterioration, rain, snow or other climatic conditions that certain streets will be seriously damaged or destroyed by vehicles weighing in excess of an amount specified by the signs, no such vehicles shall be operated on streets so designated by such signs.
(Code of Iowa, Sec. 321.471 & 472)
The Police Chief may, upon application and good cause being shown therefor, issue a special permit in writing authorizing the applicant to operate or move a vehicle or combination of vehicles of a size or weight or load exceeding the maximum specified by State law or the City over those streets or bridges named in the permit which are under the jurisdiction of the City and for which the City is responsible for maintenance.
(Code of Iowa, Sec. 321.473 & 321E.1)
Where it has been determined that any City bridge has a capacity less than the maximum permitted on the streets of the City, or on the street serving the bridge, the Police Chief may cause to be posted and maintained signs on said bridge and at suitable distances ahead of the entrances thereof to warn drivers of such maximum load limits. No person shall drive upon said bridge any vehicle weighing, loaded or unloaded, in excess of such posted limit.
(Code of Iowa, Sec. 321.471)