Laws governing the operation of bicycles, motor scooters (electric or gas powered), skateboards, and other modes of transportation on public streets, highways, and roads vary from state to state, and among cities and towns (municipal ordinances).

Some of the important laws governing these alternative modes of transportation include proper roadways and lanes for operation; speed limits; required safety precautions (helmets, etc.); application of traffic laws; license requirements; and the application of laws regarding being under the influence of alcohol or drugs.

In South Dakota, bicycles, motor scooters, skateboards, and similar modes of transportation are subject to specific regulations when operated on public streets, highways, and roads. Bicyclists are generally required to follow the same traffic laws as motor vehicles, including obeying traffic signals and signs. They should ride as close as practicable to the right-hand curb or edge of the roadway, except when overtaking another bicycle or vehicle, preparing for a left turn, or avoiding hazards. Motor scooters may need to be registered, and operators may require a valid driver's license, depending on the engine size and whether the scooter can exceed certain speeds. Helmets are not mandated by state law for bicycle riders of any age, but local ordinances in some cities may require them, especially for minors. Skateboards are often regulated at the municipal level, with some cities prohibiting their use on certain roads or sidewalks. Regarding alcohol or drugs, South Dakota prohibits operating any vehicle, including bicycles and motor scooters, while under the influence. The state does not have a specific speed limit for bicycles, but riders are expected to operate at a safe speed. It's important for individuals to check local ordinances for additional regulations that may apply to these alternative modes of transportation.