321E.9  Single-trip permits.
  Subject to the discretion and judgment provided for in section 321E.2, single-trip permits, which may include a round trip to and from a job or delivery site, shall be issued in accordance with the following provisions:
  1.   The maximum height, width, length, and weight of vehicles and loads operating under permits authorized by this section shall be limited to the maximum physical limitations and clearances of the roadway and infrastructure of the intended route of travel, provided that the gross weight on any one axle does not exceed the maximum prescribed in section 321.463, pursuant to rules adopted pursuant to chapter 17A. The permit-issuing authority shall make the final determination regarding the issuance of a permit and the suitability of the intended route based upon known roadway clearances and capacities. Permits shall be authorized only when the movement will not cause undue stress or damage to highway pavement, bridges, or other highway infrastructure. In addition to the dimension and weight limitations of an intended route, a permit-issuing authority shall consider the interests of public safety and, at the discretion of the permit-issuing authority, may deny the issuance of a permit when the intended movement of any vehicle or load poses a potential risk to the public.
  2.  Vehicles with indivisible loads may be moved in special or emergency situations, provided the permit-issuing authority has reviewed the route and has approved the movement of the vehicle and load. The permit-issuing authority may impose any special restrictions on movements as deemed necessary or exempt movements from the restrictions of section 321E.11 by permit under this subsection.
  3.  Notwithstanding any other provision of law to the contrary, cranes exceeding the maximum gross weight on any axle as prescribed in section 321.463 or 321E.7 and used in the construction of alternative energy facilities may be moved with approval from the permit-issuing authority.
[C39, §5035.18; C46, 50, 54, 58, 62, 66, §321.469; C71, 73, 75, 77, 79, 81, §321E.9]
91 Acts, ch 133, §2; 94 Acts, ch 1087, §12; 96 Acts, ch 1152, §21; 97 Acts, ch 100, §9; 97 Acts, ch 104, §26, 27; 2008 Acts, ch 1124, §13, 40; 2013 Acts, ch 49, §6
Referred to in §321.463, 321E.2, 321E.7, 321E.14