(a) No person shall drive a vehicle over any bridge or other elevated structure constituting a part of a highway at a speed which is greater than the maximum speed which can be maintained with safety to such bridge or structure, when such structure is signposted as provided in this section.
(b) The commissioner, upon request from any local authority, shall, or, upon the commissioner's own initiative, may, conduct an investigation of any bridge or other elevated structure constituting a part of a highway, and on finding that such structure cannot with safety to itself withstand vehicles traveling at the speed otherwise permissible under this chapter, the commissioner shall determine and declare the maximum speed of vehicles which such structure can withstand and cause or permit suitable signs stating such maximum speed to be erected and maintained at a distance of 100 feet before each end of such structure.
(c) Upon the trial of any person charged with a violation of this section, proof of the determination of the maximum speed by the commissioner and the existence of the signs shall constitute conclusive evidence of the maximum speed which can be maintained with safety to such bridge or structure.
Official Publication of the State of Minnesota
Revisor of Statutes