(1) The Department of Transportation is authorized to investigate and determine whether it is detrimental to traffic safety or dangerous to human life for any person to fish from a state road bridge. When the Department of Transportation, after due investigation, determines that it is dangerous for persons to fish from such a bridge, it shall post appropriate signs on the bridge stating that fishing from the bridge is prohibited.
(2) Fishing from a bridge upon which the Department of Transportation has posted signs as provided in subsection (1) is a noncriminal traffic infraction, punishable as a pedestrian violation as provided in chapter 318.
(3) This section is cumulative and is not intended to repeal any special law making it unlawful to fish from any bridge.